The polling was by and large peaceful, the election official said.
In Bihar's Araria, Rashtriya Janata Dal (RJD) and the Congress are pitted against the BJP-Janata Dal (United) alliance and it's the first big test for Nitish Kumar after he walked out of the Grand Alliance previous year to team up with the BJP.
Bihar, where votes are being counted for one Lok Sabha constituency and two Lok Sabha seats, seems headed for a status quo.
RJD is leading in Jehanabad after 10th round of counting with 29,551 votes.
In Phulpur, Samajwadi Party's Nagendra Pratap Singh Patel is leading by 15,713 votes with 1,22,247 votes followed by BJP's Kaushlendra Singh Patel with with 1,06,534 votes after 11th round of counting.
The by-elections are important because political parties, both ruling and opposition, have tried a new political experiment in these three bypolls to Lok Sabha seats. The RJD hopes to retain the Assembly seat.
Counting of votes for Araria Lok Sabha seat along with Bhabua and Jehanabad Assembly constituencies will be held on Wednesday. After the by-election for three seats in Bihar, the preparations to elect candidates for the vacant seat has been completed in Araria.
Bihar bypolls are being seen as a litmus test for Chief Minister Nitish Kumar after he pulled out of the state's Grand Alliance and joined the BJP.
In Araria, RJD's Sarfaraz Alam, son of deceased MP Taslimuddin is contesting against BJP's Pradip Singh while in Jehanabad the fight is between RJD's Suday Yadav, son of deceased MLA Mundrika Singh Yadav, and JD (U)'s Abhiram Sharma.
AM: Araria Lok Sabha by-poll: BJP leading with 58,225 votes, RJD second with 55,334. In Bhahua, BJP is leading by 2,528 votes whereas RJD candidate is ahead in Jehanabad by 8,899 votes, latest trends showed. The party gave a ticket to Yadav's son Kumar Krishna Mohan. On the other hand, the BJP is hopeful of retaining the Bhabhua Assembly seat riding on a sympathy wave for Anand Bhushan Pandey whose death at the age of 48 necessitated the bye-election.