Reportedly, an Indian Air Force Antonov-32, a Russian made aircraft, took off from Chennai and was headed for Port Blair, in the eastern archipelago of Andaman and Nicobar. The plane lost its contact when flying at an altitude of 23,000 feet and was some 270 kilometers away from its taking off base.
The aircraft is said to have descended "very fast" from its cruising height and vanished from the radar. There was no distress call from the cockpit. At the time of disappearance, the aircraft was on the fringes of blind spot, a radar-less coverage area of some 150-200 nautical miles.