The gunfire started at around 3:30 am, authorities said, adding that an official car was used to launch the attack. The incident is being seen as connected to the hijacking of a police car a day ago.
Gunfire is being heard from inside the air base and reports suggest the terrorists have been contained in a non-operational area of the facility.
The technical area where MiG 29 fighter aircraft and helicopters are kept is safe, officials said.
The National Security Guard or the NSG has been called in, authorities said. Helicopters have also dispatched to the area for assistance in operation.
According to official sources, intelligence inputs had alerted security forces of a possible terror attack late yesterday following which the security had been increased in the area.
The strike is being suspected to have been launched by the terror outfit Jaish-e-Mohammed who wanted to damage military assets in the area officials said.
The attack comes within six months of the Gurdaspur terrorist strike where three terrorists equipped with grenades and AK-47s, opened fire in Dinanagar killing three civilians.
The terrorists were shot dead after a 12-hour long gun battle with the security forces in which four policemen were also killed.
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