Siwan To Akbarganj Trains

Popular Trains from Siwan to Akbarganj

24 found from SRU, THE, SV, ROI, BUI, SIP to BBK, GTNR, RDL, NHH, SLN

Train name and number	Starting station	Duration	Ending station
15007 - BCY LJN EXPRESS Runs onMTWTFSS	08:11 PM SRU Salempur 44 KM from SV	8h 17m 282 KM 37 stops	04:28 AM BBK Barabanki 55 KM from AKJ
15114 - CI GTNR EXP Runs onMTWTFSS	10:00 PM THE Thawe 25 KM from SV	7h 42m 324 KM 17 stops	05:43 AM BBK Barabanki 55 KM from AKJ
15077 - KYQ GTNR EXPRESS Runs onMTWTFSS	04:40 PM SV Siwan	9h 341 KM 16 stops	01:40 AM GTNR Lucknow 61 KM from AKJ
15083 - CPR FBD EXPRESS Runs onMTWTFSS	06:52 PM ROI Reoti 41 KM from SV	9h 7m 281 KM 33 stops	03:59 AM RDL Rudauli 35 KM from AKJ
14523 - HARIHAR EXP Runs onMTWTFSS	11:55 AM BUI Ballia 54 KM from SV	6h 53m 263 KM 21 stops	06:48 PM NHH Nihalgarh 15 KM from AKJ
15203 - BJU LJN EXP Runs onMTWTFSS	02:20 AM SV Siwan	8h 56m 326 KM 35 stops	11:16 AM BBK Barabanki 55 KM from AKJ
15053 - CPR LJN EXPRESS Runs onMTWTFSS	08:06 PM SIP Suraimanpur 46 KM from SV	11h 37m 366 KM 14 stops	07:43 AM GTNR Lucknow 61 KM from AKJ
13019 - BAGH EXPRESS Runs onMTWTFSS	03:00 PM SV Siwan	8h 18m 326 KM 62 stops	11:18 PM BBK Barabanki 55 KM from AKJ	Starting from ₹235
19306 - KYQ DADN EXP Runs onMTWTFSS	01:05 AM BUI Ballia 54 KM from SV	7h 20m 215 KM 38 stops	08:25 AM SLN Sultanpur 63 KM from AKJ	Starting from ₹200
14015 - SADBHAVANA EXP Runs onMTWTFSS	07:10 AM SIP Suraimanpur 46 KM from SV	9h 2m 293 KM 37 stops	04:12 PM NHH Nihalgarh 15 KM from AKJ
14007 - SADBHAVANA EXP Runs onMTWTFSS	07:10 AM SIP Suraimanpur 46 KM from SV	9h 3m 293 KM 37 stops	04:13 PM NHH Nihalgarh 15 KM from AKJ
19166 - SABARMATI EXP Runs onMTWTFSS	10:30 AM SIP Suraimanpur 46 KM from SV	8h 59m 292 KM 72 stops	07:29 PM RDL Rudauli 35 KM from AKJ
11124 - BJU GWL MAIL Runs onMTWTFSS	01:35 AM SV Siwan	8h 8m 326 KM 36 stops	09:43 AM BBK Barabanki 55 KM from AKJ
22531 - CPR MTJ SF EXP Runs onMTWTFSS	06:08 AM SV Siwan	6h 10m 326 KM 23 stops	12:18 PM BBK Barabanki 55 KM from AKJ	Starting from ₹680
12553 - VAISHALI EXP Runs onMTWTFSS	02:45 PM SV Siwan	6h 11m 326 KM 28 stops	08:56 PM BBK Barabanki 55 KM from AKJ	Starting from ₹265
12521 - RAPTI SAGAR EXP Runs onMTWTFSS	04:05 AM SV Siwan	6h 20m 326 KM 64 stops	10:25 AM BBK Barabanki 55 KM from AKJ
19602 - NJP UDZ SPECIAL Runs onMTWTFSS	07:45 PM SV Siwan	6h 23m 326 KM 30 stops	02:08 AM BBK Barabanki 55 KM from AKJ
15707 - KIR ASR SPECIAL Runs onMTWTFSS	09:50 AM SV Siwan	6h 43m 326 KM 61 stops	04:33 PM BBK Barabanki 55 KM from AKJ
15909 - AVADH ASSAM EXP Runs onMTWTFSS	09:08 PM SV Siwan	6h 45m 326 KM 91 stops	03:53 AM BBK Barabanki 55 KM from AKJ	Starting from ₹235
14649 - SARYU YAMUNA EX Runs onMTWTFSS	03:04 PM SIP Suraimanpur 46 KM from SV	7h 52m 292 KM 59 stops	10:56 PM RDL Rudauli 35 KM from AKJ
15715 - GARIB NAWAZ EXP Runs onMTWTFSS	06:20 PM BUI Ballia 54 KM from SV	7h 57m 263 KM 32 stops	02:18 AM RDL Rudauli 35 KM from AKJ
15101 - CPR LTT EXP Runs onMTWTFSS	06:30 PM SV Siwan	8h 1m 229 KM 24 stops	02:31 AM SLN Sultanpur 63 KM from AKJ
14673 - SHAHEED EXPRESS Runs onMTWTFSS	03:35 PM SV Siwan	8h 18m 326 KM 54 stops	11:53 PM BBK Barabanki 55 KM from AKJ
14017 - SADBHAVANA EXP Runs onMTWTFSS	07:10 AM SIP Suraimanpur 46 KM from SV	9h 5m 292 KM 34 stops	04:15 PM RDL Rudauli 35 KM from AKJ

Covid Special Trains from Siwan to Akbarganj

37 found from SV, BUI, THE, CPR, STW, SRU, SIP, ROI to BBK, BUW, NHH, SLN, RDL, GTNR

Train name and number	Starting station	Duration	Ending station
05117 - CPR MTJ SF SPL Runs onMTWTFSS	06:08 AM SV Siwan	6h 10m 326 KM 23 stops	12:18 PM BBK Barabanki 55 KM from AKJ
02553 - SHC NDLS SPECIAL Runs onMTWTFSS	02:45 PM SV Siwan	6h 11m 326 KM 26 stops	08:56 PM BBK Barabanki 55 KM from AKJ
05951 - DBRG JAT SPECIAL Runs onMTWTFSS	08:50 PM SV Siwan	6h 12m 326 KM 36 stops	03:03 AM BBK Barabanki 55 KM from AKJ
05179 - CPR SC HSP SPL Runs onMTWTFSS	06:10 AM SV Siwan	6h 12m 326 KM 21 stops	12:22 PM BBK Barabanki 55 KM from AKJ
02521 - BNC KYQ SPL Runs onMTWTFSS	04:05 AM SV Siwan	6h 20m 326 KM 60 stops	10:25 AM BBK Barabanki 55 KM from AKJ
09602 - NJP UDZ SPECIAL Runs onMTWTFSS	07:45 PM SV Siwan	6h 23m 326 KM 30 stops	02:08 AM BBK Barabanki 55 KM from AKJ
04077 - BNKI-ASR HOLI SPL Runs onMTWTFSS	05:15 PM SV Siwan	6h 39m 311 KM 50 stops	11:54 PM BUW Burhwal 62 KM from AKJ
04533 - HARIHAR EXP SPL Runs onMTWTFSS	12:00 PM BUI Ballia 54 KM from SV	6h 48m 263 KM 21 stops	06:48 PM NHH Nihalgarh 15 KM from AKJ
05733 - KIR ASR SPECIAL Runs onMTWTFSS	09:45 AM SV Siwan	6h 48m 326 KM 53 stops	04:33 PM BBK Barabanki 55 KM from AKJ
09306 - KYQ DADN SPL Runs onMTWTFSS	01:25 AM BUI Ballia 54 KM from SV	6h 50m 215 KM 35 stops	08:15 AM SLN Sultanpur 63 KM from AKJ
04307 - PYGS BE SPL Runs onMTWTFSS	08:12 PM SV Siwan	6h 53m 326 KM 16 stops	03:05 AM BBK Barabanki 55 KM from AKJ
09426 - Delhi Sarai Rohilla Ahmedabad Ac Premium Special Runs onMTWTFSS	11:45 PM SV Siwan	7h 3m 326 KM 25 stops	06:48 AM BBK Barabanki 55 KM from AKJ
05115 - CI ANVT SPECIAL Runs onMTWTFSS	11:10 AM THE Thawe 25 KM from SV	7h 8m 307 KM 20 stops	06:18 PM BUW Burhwal 62 KM from AKJ
05101 - CI ANVT SPECIAL Runs onMTWTFSS	11:10 AM THE Thawe 25 KM from SV	7h 8m 307 KM 20 stops	06:18 PM BUW Burhwal 62 KM from AKJ
05557 - SHC NDLS SPL Runs onMTWTFSS	01:20 AM SV Siwan	7h 10m 326 KM 17 stops	08:30 AM BBK Barabanki 55 KM from AKJ
05909 - DBRG LGH EXPRESS Runs onMTWTFSS	08:40 PM SV Siwan	7h 12m 326 KM 83 stops	03:53 AM BBK Barabanki 55 KM from AKJ
05103 - CPR AII SPL Runs onMTWTFSS	09:30 PM SV Siwan	7h 19m 326 KM 22 stops	04:50 AM BBK Barabanki 55 KM from AKJ
00974 - KISAN RAIL Runs onMTWTFSS	03:40 AM CPR Chhapra 59 KM from SV	7h 20m 376 KM 20 stops	11:00 AM BBK Barabanki 55 KM from AKJ
09522 - SPJ RJT SPL Runs onMTWTFSS	11:20 AM SV Siwan	7h 25m 326 KM 26 stops	06:45 PM BBK Barabanki 55 KM from AKJ
04649 - JYG ASR SPECIAL Runs onMTWTFSS	03:25 PM STW Sahatwar 43 KM from SV	7h 26m 273 KM 53 stops	10:51 PM RDL Rudauli 35 KM from AKJ
09430 - MFP ADI SPL Runs onMTWTFSS	01:20 AM SV Siwan	7h 40m 326 KM 24 stops	09:00 AM BBK Barabanki 55 KM from AKJ
09050 - SPJ MMCT SPL Runs onMTWTFSS	02:35 AM SV Siwan	7h 40m 326 KM 29 stops	10:15 AM BBK Barabanki 55 KM from AKJ
05114 - CI GTNR EXP SPL Runs onMTWTFSS	10:00 PM THE Thawe 25 KM from SV	7h 42m 324 KM 17 stops	05:43 AM BBK Barabanki 55 KM from AKJ
05715 - KNE AII SPECIAL Runs onMTWTFSS	06:40 PM BUI Ballia 54 KM from SV	7h 56m 263 KM 29 stops	02:36 AM RDL Rudauli 35 KM from AKJ
03019 - HWH KGM SPL Runs onMTWTFSS	03:00 PM SV Siwan	7h 58m 326 KM 59 stops	10:58 PM BBK Barabanki 55 KM from AKJ
04186 - BJU GWL SPL Runs onMTWTFSS	11:15 AM SV Siwan	8h 8m 326 KM 20 stops	07:23 PM BBK Barabanki 55 KM from AKJ
05007 - BCY LJN SPL Runs onMTWTFSS	08:11 PM SRU Salempur 44 KM from SV	8h 17m 282 KM 29 stops	04:28 AM BBK Barabanki 55 KM from AKJ
04673 - JYG ASR SPL Runs onMTWTFSS	03:35 PM SV Siwan	8h 18m 326 KM 49 stops	11:53 PM BBK Barabanki 55 KM from AKJ
05612 - GHY GTNR SPECIAL Runs onMTWTFSS	05:00 PM SV Siwan	8h 20m 341 KM 26 stops	01:20 AM GTNR Lucknow 61 KM from AKJ
05077 - KYQ GTNR SPECIAL Runs onMTWTFSS	04:50 PM SV Siwan	8h 50m 341 KM 14 stops	01:40 AM GTNR Lucknow 61 KM from AKJ
05203 - BJU LJN EXAM SPL Runs onMTWTFSS	02:20 AM SV Siwan	8h 56m 326 KM 31 stops	11:16 AM BBK Barabanki 55 KM from AKJ
04007 - RXL ANVT SPL Runs onMTWTFSS	07:10 AM SIP Suraimanpur 46 KM from SV	9h 3m 293 KM 33 stops	04:13 PM NHH Nihalgarh 15 KM from AKJ
09166 - DBG ADI SPL Runs onMTWTFSS	10:41 AM STW Sahatwar 43 KM from SV	9h 8m 273 KM 71 stops	07:49 PM RDL Rudauli 35 KM from AKJ
04017 - RXL ANVT SPL Runs onMTWTFSS	07:10 AM SIP Suraimanpur 46 KM from SV	9h 11m 292 KM 33 stops	04:21 PM RDL Rudauli 35 KM from AKJ
05083 - CPR FBD SPL Runs onMTWTFSS	06:52 PM ROI Reoti 41 KM from SV	9h 36m 281 KM 33 stops	04:28 AM RDL Rudauli 35 KM from AKJ
05285 - BJU AII URS SPL Runs onMTWTFSS	02:05 PM BUI Ballia 54 KM from SV	9h 38m 323 KM 31 stops	11:43 PM BBK Barabanki 55 KM from AKJ
04063 - JBN ANVT SPECIAL Runs onMTWTFSS	12:30 PM BUI Ballia 54 KM from SV	10h 14m 323 KM 24 stops	10:44 PM BBK Barabanki 55 KM from AKJ

Other Trains from Siwan to Akbarganj

4 found from SV, ROI to BUW, BBK, RDL

Train name and number	Starting station	Duration	Ending station
14617 - BNKI-ASR JANSEWA EXP Runs onMTWTFSS	05:15 PM SV Siwan	6h 39m 311 KM 51 stops	11:54 PM BUW Burhwal 62 KM from AKJ
14603 - JANSADHARAN EXP Runs onMTWTFSS	01:20 AM SV Siwan	6h 50m 311 KM 34 stops	08:10 AM BUW Burhwal 62 KM from AKJ
15609 - Avadh Assam Express (PT) Runs onMTWTFSS	08:55 PM SV Siwan	7h 40m 326 KM 89 stops	04:35 AM BBK Barabanki 55 KM from AKJ
18191 - UTSARG EXP Runs onMTWTFSS	06:52 PM ROI Reoti 41 KM from SV	9h 36m 281 KM 33 stops	04:28 AM RDL Rudauli 35 KM from AKJ

Trains from Akbarganj to Siwan

Trains originating from Siwan

Train name and number	Starting station	Duration	Ending station
01366 - CPR CSMT SF SPL	07:40 PM CPR Chhapra	1053 KM 25 stops	06:55 PM BSL Bhusaval
07652 - CPR J FEST SPL	10:15 PM CPR Chhapra	1d 5h 45m 1122 KM 24 stops	04:00 AM J Jalna
09066 - CPR ST SPECIAL	08:30 AM CPR Chhapra	1d 5h 15m 1315 KM 12 stops	01:45 PM ST Surat
19046 - TAPTI GANGA EXP	09:00 AM CPR Chhapra	1d 7h 5m 1315 KM 38 stops	04:05 PM ST Surat
09088 - CPR UDN SF SPL	12:15 AM CPR Chhapra	20h 20m 1368 KM 22 stops	08:35 PM SJN Sanjan

Trains passing through Siwan

Train name and number	Starting station	Duration	Ending station
15910 - AVADH ASSAM EXP	04:00 AM CPR Chhapra	1d 10h 5m 1032 KM 96 stops	02:05 PM DBRG Dibrugarh
20506 - DBRG RAJDHANI	02:12 AM CPR Chhapra	1d 1h 8m 1032 KM 29 stops	03:20 AM DBRG Dibrugarh
04670 - SVDK DBRG SPL	06:00 PM CPR Chhapra	1d 2h 45m 1032 KM 30 stops	08:45 PM DBRG Dibrugarh
04674 - FZR DBRG SPL	06:00 PM CPR Chhapra	1d 2h 45m 1032 KM 31 stops	08:45 PM DBRG Dibrugarh
20504 - DBRG RAJDHANI	02:12 AM CPR Chhapra	1d 2h 28m 1032 KM 29 stops	04:40 AM DBRG Dibrugarh

Trains reaching to Akbarganj

Train name and number	Starting station	Duration	Ending station
20939 - ADI SLN SF EXP	08:00 AM ADI Ahmedabad	1d 4h 1022 KM 20 stops	12:00 PM SLN Sultanpur
12143 - LTT SLN SF EXP	03:50 PM LTT Mumbai	1d 1h 40m 1235 KM 14 stops	05:30 PM SLN Sultanpur
03219 - PPTA GTNR SPL	07:40 PM PPTA Patna	15h 40m 428 KM 22 stops	11:20 AM GTNR Lucknow
19715 - JP GTNR EXP	09:05 PM JP Jaipur	14h 35m 517 KM 21 stops	11:40 AM GTNR Lucknow
14014 - SULTANPUR EXP	04:30 PM ANVT Delhi	13h 25m 539 KM 15 stops	05:55 AM SLN Sultanpur

Trains passing through Akbarganj

Train name and number	Starting station	Duration	Ending station
09182 - DNR BRC SF SPL	02:22 AM SLN Sultanpur	1d 8m 1002 KM 19 stops	02:30 AM BRC Vadodara
04607 - SVDK FEST SPL	08:32 AM SLN Sultanpur	1d 48m 1017 KM 14 stops	09:20 AM SVDK Katra
09418 - PNBE ADI SPL	08:20 AM SLN Sultanpur	1d 3h 1022 KM 27 stops	11:20 AM ADI Ahmedabad
20940 - SLN ADI SF EXP	06:05 PM SLN Sultanpur	1d 3h 55m 1022 KM 20 stops	10:00 PM ADI Ahmedabad
15078 - GTNR KYQ EXP	10:00 AM GTNR Lucknow	1d 3h 50m 1067 KM 15 stops	01:50 PM KYQ Guwahati

Siwan to Akbarganj Trains

Looking for Siwan to Akbarganj trains? You can choose from a large number of trains running regularly on this route. Siwan to Akbarganj trains is considered to be the most preferred and efficient mode of transportation for commuting between these two cities. There are frequent daily trains that run between these cities.On a weekly basis, there are 15 trains running between Siwan to Akbarganj.To get accurate information regarding Siwan to Akbarganj trains, Siwan Akbarganj Railway Timetable, and Siwan to Akbarganj Train Fare, you can visit the Goibibo app or website. You can also book train ticket online through Goibibo in a few steps. The user-friendly interface, easy booking process and attractive offers on train ticket booking help the travellers in booking their tickets at the most reasonable prices. You can also do tatkal train ticket booking for Siwan to Akbarganj Trains through Goibibo.

Siwan to Akbarganj train timings and fare are the two main factors that compel travellers to opt for Siwan to Akbarganj Trains for a hassle-free journey. 22531 - CPR MTJ SF EXP is the fastest among the Siwan to Akbarganj Trains. It departs from Siwan Junction(SV) at 06:08 AM and arrives at Siwan Junction(BBK) at 12:18 PM, covering the distance in just 6 hrs 10 mins .While looking for an early morning train from Siwan to Akbarganj, you can choose to travel via 19306 - KYQ DADN EXP. It takes 7 hrs 20 mins to complete the journey, starting from Ballia Railway Station(BUI) at 01:05 AM and reaching Akbarganj at 08:25 AM.

The first train from Siwan to Akbarganj is 19306 - KYQ DADN EXP departing at 01:05 AM from Ballia Railway Station(BUI).Some popular weekly trains on Siwan to Akbarganj train route are 15007 - BCY LJN EXPRESS, 15114 - CI GTNR EXP, 15083 - CPR FBD EXPRESS. Every Friday 15007 - BCY LJN EXPRESS departs from Siwan at 08:11 PM and arrives at Agra at 08:09 PM covering the entire distance in 8 hrs 17 mins .The boarding station for all Siwan to Akbarganj trains are the Salempur Junction(SRU), Thawe Junction(THE), Siwan Junction(SV), Reoti Railway Station(ROI), Ballia Railway Station(BUI), Suraimanpur Railway Station(SIP), Chhapra Junction(CPR), Sahatwar Railway Station(STW) while deboarding at Akbarganj can be at Barabanki Junction(BBK), Gomati Nagar Railway Station(GTNR), Rudauli Railway Station(RDL), Nihalgarh Railway Station(NHH), Sultanpur Railway Station(SLN), Burhwal Railway Station(BUW).For all of the trains running on this route, you can check the live train running status, running history and PNR status on the Goibibo app and the website. Goibibo in collaboration with Indian railways also offers IRCTC registration and signup through its IRCTC Create User Id page. The stations are well-connected with the rest of the city with easy conveyance options. The Siwan to Akbarganj train route witnesses regular rush of travellers. However, the large number of trains on this route provides direct and easy connectivity catering to the needs of all types of travellers.

Book your Siwan to Akbarganj Trains on Goibibo

Akbarganj is one of the popular cities of India. There are plenty of amazing tourist spots in Akbarganj that can make your journey memorable. You can book a Siwan to Akbarganj Train and visit this gorgeous city with family and friends.
In order to explore the city’s places of interest, you can board the Siwan to Akbarganj train. You can book your train from Siwan to Akbarganj on Goibibo and enjoy a hassle-free trip. You can either make your bookings on Goibibo’s website or via the official app.

Siwan to Akbarganj Train Timings

There are plenty of trains running on the Siwan to Akbarganj route everyday, so the train seat availability is sufficient. You can board a train to Akbarganj from the popular railway stations of your city and reach there within a short period of time. Moreover, you will face no problem in boarding any Siwan to Akbarganj train, as the train journey is comfortable as well as secure.

How to Book your Siwan to Akbarganj Trains with Goibibo?

Step 1: To book your Siwan to Akbarganj trains, visit Goibibo.com.
Step 2: Enter your journey date, departure station, and arrival station. All the trains of that particular date will appear on your screen.
Step 3: Click on the seat class, and you’ll be redirected to another page where you can see the available coupons and cash rewards.
Step 4: Enter your personal details, click on ‘Continue’, and you’ll reach the payment part.
Step 5: Choose the payment option, make the payment, and the ticket confirmation will be sent to your E-Mail and mobile number.

FAQs About Siwan to Akbarganj Trains

Which trains are running from Siwan to Akbarganj?

Total 61 trains runs from Siwan and Akbarganj. Popular Trains that run from Siwan to Akbarganj are 15007 - BCY LJN EXPRESS, 15114 - CI GTNR EXP, 15077 - KYQ GTNR EXPRESS, 15083 - CPR FBD EXPRESS, 14523 - HARIHAR EXP. Book Now

How many Covid Special trains are currently running from Siwan to Akbarganj?

61 Covid Special trains are currently running from Siwan to Akbarganj. Book Now

Which is the fastest train from Siwan to Akbarganj?

Fastest train from Siwan to Akbarganj is 22531 - CPR MTJ SF EXP which takes 6 hrs 10 mins to reach Akbarganj. Book Train Tickets

When does the first Siwan to Akbarganj train leave?

The first train from Siwan to Akbarganj is 19306 - KYQ DADN EXP with departure at 01:05 AM from Ballia Railway Station(BUI). Book Now

Which is the last train to Siwan from Akbarganj ?

15114 - CI GTNR EXP is the last train between Siwan from Akbarganj with departure at 10:00 PM from Thawe Junction(THE). Book Now

What is the travel distance and travel time from Siwan to Akbarganj?

The approximate travel distance from Siwan to Akbarganj is 326 KM and minimum travel time is 6 hrs 10 mins .

From which all stations in Siwan we can board trains to Akbarganj?

Stations in Siwan where we can board trains to Akbarganj are the Salempur Junction(SRU), Thawe Junction(THE), Siwan Junction(SV), Reoti Railway Station(ROI), Ballia Railway Station(BUI), Suraimanpur Railway Station(SIP), Chhapra Junction(CPR), Sahatwar Railway Station(STW). Book Now

How to get the latest online information about my booking from Siwan to Akbarganj Trains?

If you are travelling from Siwan to Akbarganj, you can check PNR STATUS for latest tickets information can be checked through Goibibo train app or Goibibo website.

How to book tatkal tickets from Siwan to Akbarganj?

You can book TATKAL TICKETS ONLINE, Booking starts from one day prior to the date of journey, from Siwan to Akbarganj

Siwan To Akbarganj Trains

Popular Trains from Siwan to Akbarganj

Covid Special Trains from Siwan to Akbarganj

Other Trains from Siwan to Akbarganj

Trains originating from Siwan

Trains passing through Siwan

Trains reaching to Akbarganj

Trains passing through Akbarganj

Popular Train Routes From Siwan

Popular Train Routes To Siwan

Popular Train Routes To Akbarganj

Popular Train Routes From Akbarganj

Popular Train Routes in India

Running Status of trains from Siwan to Akbarganj

Time Table for Popular Trains from Siwan to Akbarganj

Railway Stations nearby Siwan

Railway Stations nearby Akbarganj

Buses from Siwan