Security around the country's airports has been stepped up and all anti-hijacking measures put in place after intelligence agencies warned of a possible hijack attempt. An anonymous telephone call was received by the Kolkata office of Air India threatening that its flight would be hijacked. Airport sources told PTI that in view of the threat, security at all the airports have been strengthened and checking beefed up at some of the major airports, including Indira Gandhi International Airport in New Delhi.

Meanwhile, Kolkata police are trying to trace from where the call came to the Kolkata Air India office.