An unidentified blip on the radar of the Air Traffic Control (ATC) in Delhi caused a scare, leading to a delay in the landing of Prime Minister Manmohan Singh's special aircraft at the Indira Gandhi International Airport in New Delhi on Tuesday evening.
The Airport Authority of India has begun an enquiry into the incident, in which the ATC officers asked the pilot of the Prime Minister's aircraft to hover over the airport for about 15 minutes, according to the local newspaper the Hindustan Times Wednesday.
As Singh's flight was coming from Ranchi neared the Delhi airport, the Air Traffic Control identified a blip on the radar which appeared to be chasing the prime minister's flight, the Air Traffic Control directed the flight to hover over for 15 minutes before allowing it to land on Runway 28 at the airport.
The prime minister's aircraft landed safely.
Asked as to what this blip could mean, the Airport Authority of India said that it could be an aircraft carrying a transponder on board which could be connected to the secondary radar on ground.