An Indian military aircraft, however, crashed in Badgam in Jammu and Kashmir, 7 kilometres from the Srinagar International Airport, police said, leading to the suspension of commercial flights across at least eight cities including Leh, Pathankot, Jammu, Srinagar and Amritsar.

India shot down one of the Pakistan Air Force (PAF) F-16s that had come close to the Line of Control (LoC) in Nowshera sector. The aircraft fell three kilometres in Pakistani-administered Kashmir.

As the PAF jets approached the LoC, the Indian Air Force (IAF) scrambled fighters. Retaliatory fire from the ground force forced the F-16s to return but not before one took a hit and went down.

The incident occurred a day after IAF jets bombed the biggest training camp of the Jaish-e-Mohammed (JeM) outfit in Balakot.

"The jets entered the Indian air space over Nowshera in Rajouri district this morning," a police officer said, adding that the Indian fighter jets on air patrol immediately scrambled and pushed them back beyond the LoC.

Indian Air Defence Systems have been on maximum alert since Tuesday.

Simultaneously, Indian and Pakistani troops traded heavy fire using mortars and small arms in Jammu and Kashmir's Uri sector, Defence Ministry sources said.

The clash occurred in Kamalkote area.

Heavy firing was also continuing intermittently at 40 places on the LoC including Poonch, Rajouri and Jammu districts since Tuesday night.

The Indian attack on the JeM training camp came 12 days after a suicide bomber killed 40 Central Reserve Police Force troopers in the worst terror strike in Jammu and Kashmir since militancy hit the state in 1989. The attack was claimed by the Pakistan-based JeM.