At least four armed men have stormed India's Pathankot Air Base in the northern Punjab state bordering Pakistan, Sputnik reported with the reference to the local media.
Two of the attackers have been killed, The Times of India said early on Saturday.
The attack started at 03:30 a. m. local time on Saturday, according to NDTV. An official car was used to launch the attack, NDTV said citing authorities.
RT said citing media reports on Saturday that two Indian servicemen have also been killed in the attack and helicopters have been dispatched to the base.
The Times of India put the number of attackers at four to six, saying they launched their attack from a nearby building in a village.
Helicopters have been dispatched to the base and India's National Security Guard has been called in, according to NDTV.
The battle is ongoing, but the attackers have been contained in a non-operational part of the base and the MiG-29 fighter aircraft and helicopters kept at the base are safe, NDTV said.
Less than 12 hours ago, suspected militants in military uniforms kidnapped a former police official in Punjab's Gurdaspur district, according to The Times of India.
Gurdaspur superintendent of police (SP) Salwinder Singh was later abandoned by his attackers, suspected to be Pakistani nationals, The Times of India said on Friday.