The FIR for violating the Model Code of Conduct was lodged by the District Election Officer last night on the directions of the Election Commission, Returning Officer Rajesh Kumar said.
It has been registered at the Sector 39 police station and the EC has been intimated, Kumar said.
The Gorakhpur MP had allegedly used religion to seek votes for BJP candidate Vimla Batham during a rally in Sector 45 on September 7, Kumar said.
The EC had ordered lodging of the FIR after seeing the CD of the speech.
Bypolls will take place in Noida and other assembly constituencies of UP tomorrow and Adityanath was BJP's lead campaigner.
