The exchange of fire and mortars between the two sides was reported from the IB in Hiranagar sector of Kathua district, 333 km south of Srinagar, summer capital of Indian-controlled Kashmir.
According to the broadcaster, Pakistani troops fired small, medium and heavy arms on the outposts of India's Border Security Force (BSF).
"Pakistan forces from across the border started unprovoked firing targeting Indian posts using small, medium and heavy arms around 12:30 a.m. local time," AIR reported.
"The firing was retaliated by the BSF troops guarding the border."
The exchange of fire had lasted for around four hours, officials said.
Indian officials said there were no reports of damage on the Indian side due to Wednesday's fire exchange, Xinhua reported.
Both New Delhi and Islamabad accuse each other of resorting to unprovoked firings and violating cease-fire agreements.