BJP, whose Prime Ministerial candidate is in fray from Varanasi as well as Vadodara seats, said Congress party has sealed this pact as it was unable to counter the "massive support and popularity" of Modi in this holy city.
"It now appears that Ajay Rai and QED are willing to even forge an unholy alliance of political convenience at the altar of vote bank politics," BJP leader Nalin Kohli said.
Quami Ekta Dal chief Afzal Ansari, brother of Mukhtar Ansari, today announced his party will support Rai from Varanasi Lok Sabha seat to defeat Modi.
Rai had recently alleged about an informal pact between BJP and Ansari during the last elections to defeat him.