A threat of a bomb explosion or a possible suicide attack on an Air India flight from Mumbai sparked an alert with authorities beefing up security at major airports across the country. A high alert has been sounded in the Mumbai, Kochi and Ahmedabad airports.

Airport Director A K C Nair told PTI that they received information from Kolkata that there is a threat to the AI flight on the Mumbai-Kochi sector on October 25 and Ahmedabad-Mumbai sector on Friday night.

"There was a threat of bomb attack or bomb suicide attack," he said.

A high-level meeting was convened this morning by Central Industrial Security Force Deputy Inspector General Anand Mohan, who arrived in Kochi from Chennai, to review the security at the airport.

The Director of Airports Authority of India, Kolkata, had received an anonymous call on Thursday night stating that AI flights on the Ahmedabad-Mumbai and Mumbai-Kochi sector will be 'sabotaged', airport sources said.

The information had been handed over to police and Bureau of Civil Aviation Security and as per their directions security has been tightened at the airport, the sources said.

A Bomb Detection and Disposal Squad, Quick Response team, CISF and police are keeping a constant vigil at the airports. Security at the Kochi airport perimeter entrance has also been further tightened.

Image: An anonymous call warned of threat to Air India flights

With inputs from PTI