Terrorists fired on a joint checkpost of the 4 Rashtriya Rifles and police in the Chatergala area of the district, additional director general of police Anand Jain said. 

Security personnel retaliated and a gunfight is on, he said. 

The development came even as security forces were conducting a massive operation to flush out holed-up terrorists who had attacked a village near the International Border in Kathua district on Tuesday evening and injured a civilian. 

A suspected Pakistani terrorist has been killed by security forces in the Kathua operation, the police said. -- PTI