Officials and news reports say Indian troops have shot and killed four gunmen who had entered an Indian air force base near the border with Pakistan and exchanged fire with security forces. At least two Indian soldiers were also killed.

Air force spokeswoman Rochelle D'Silva says the gunmen entered the living quarters of the Pathankot air force base, about 430 kilometers (267 miles) north of New Delhi, but were not able to penetrate the area with fighter helicopters and other equipment.

Press Trust of India news agency is quoting police as saying that four attackers have been killed following the hourslong gunbattle and police have started an operation to clear a wider area of other possible intruders.