While 52.80 per cent polling was witnessed in Bilari (Moradabad/Sambhal), 46 per cent votes were cast in Jangipur (Ghazipur), an official release said.
Both seats were held by the ruling Samajwadi Party.
Jangipur seat in Ghazipur district fell vacant when sitting MLA and cabinet minister Kailash Yadav died in February after a brain haemorrhage, while bypoll in Bilari was necessitated following the death of 64-year-old Haji Irfan in a road accident on March 10.
According to the schedule announced by the Election Commission, counting of votes will take place on May 19.
