New Delhi, Sept. 8 -- Operations at Amritsar airport were suspended for more than an hour on Sunday night due to suspected drone activity over the airport, forcing seven aircraft holding for landing to be diverted, officials aware of the matter said. An FIR has been registered against unknown people, police said. According to people aware of the matter, the airport was closed for operations at around 9.50pm after the Indian Air Force (IAF) informed the Air Traffic Control (ATC) about drone activity across the airfield. "Around seven flights thus had to be diverted, to Chandigarh and Delhi because planes scheduled to land at Amritsar were already holding near the airport area," an Airports Authority of India (AAI) official said. "Two of the flights were diverted to Chandigarh and five of them were diverted to Delhi. These five included two flights each of Air India, IndiGo and one of Air India Express," a Delhi airport official said. As per the standard operating procedure (SOP) for drone sightings, a committee was formed to assess if the drone activity could pose a threat to aircraft movements. "After assessing the situation, the committee decided to temporarily suspend the flight operations at the airport at around 9.50 pm," the AAI official added. Another official aware of the development said, "The committee reviewed the situation around 11 pm because no more drones were seen or reported around the airport. The airport was thus cleared to resume operations at 11.15pm." Five of the seven diverted flights later returned to Amritsar. An airline official said that the airline had enough fuel to hold for over an hour. Meanwhile, Amritsar (rural) SSP Kanwalpreet Singh Chahal said a formal complaint was lodged by the Airport Authority this morning, following which a search operation was launched in the surrounding areas. "Preliminary inquiries revealed that a kabaddi tournament was taking place in a nearby village. We are investigating that angle as well."...