Three militants were gunned down in an infiltration bid on the Line of Control (LoC) in Jammu and Kashmir's Kupwara district Tuesday, the army said.A gun battle was still on around 12.30 p.m. between the security forces and militants on a day voters of this border district cast their ballots in the second phase of assembly elections.The army said a group of five to eight heavily armed guerrillas made an infiltration bid in Nowgam area of the LoC Tuesday morning."Alert soldiers engaged the group in a sustained gun battle in Nowgam sector on our side of the LoC. Three militants were killed," a senior army officer told IANS.