After eighth round of counting, BJP is leading in Bhabua with 19,738 votes and RJD is leading in Jehanabad after tenth round of counting with 29,551 votes.
Both the BJP and the BSP-SP combine have fielded candidates from the Patel community.
Samajwadi Party's Nagendra Pratap Singh Patel leading by 12,231 votes with 99,557 votes, BJP's Kaushlendra Singh Patel second with 87,326 votes after eight round of counting.
In Bhabua, BJP's Rinki Pandey is leading over Congress' Sambhu Patel, while Janta Dal-United's Abhiram Sharma is leading from Jahanabad assembly seat over Rashtriya Janata Dal's Suday Yadav.
For the BJP, the election is a prestige issue for chief minister Yogi Adityanath who represented the Gorakhpur Lok Sabha seat five times in a row till he took over as chief minister in 2017. It is an interesting contest in Gorakhpur with the Samajwadi Party and Bahujan Samaj Party coming together to defeat the Bharatiya Janata Party.
In Phulpur, SP candidate Nagendra Pratap Singh Patel was leading by 8,199 votes after seven rounds of counting, election officials said. There is no other way I could lose the elections.
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However, the stakes are also high for the Opposition after BSP chief Mayawati went out of character and announced support to the Samajwadi Party candidates.
Low voter turnout was recorded at both the constituencies.
There 19.61 lakh voters in Phulpur parliamentary constituency, while there are 19.49 lakh electorate for Gorakhpur Lok Sabha seat.
A total of 47 per cent polling was recorded in Gorakhpur Lok Sabha bypoll.
Snags in the electronic voting machines (EVMs) were reported from some places. Polling was held up at Kidwai College in Allahabad (East) for some time due to a technical glitch.
As of 10 am, the BJP candidate in Phulpur was closing in on the SP one, even though the latter was still ahead.
The Samajwadi Party (SP) has fielded Praveen Nishad in Gorakhpur. The Congress put up its own candidate.