Kolkata: A hijack threat to a Mumbai-bound Air India flight before take-off on Wednesday morning that prompted security officials to park the aircraft in an isolation bay of the airport here and initiate statutory checks has turned out to be a hoax, an official said.

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Authorities at the Netaji Subhash Chandra Bose International Airport said flight AI 2772 will now depart around 5 pm following completion of necessary checks as per protocol.

The flight was originally scheduled to depart around 10.30 am.

The note threatening that the plane would be hijacked at 11.10 am was found in the washroom just before take-off, said Vikram Singh, the director of the Kolkata Airport.

All 105 passengers in the aircraft were deboarded, and it was taken to the isolation bay, he said.

According to an official statement, the note was found inside the lavatory of the Air India flight by its cabin crew at 10.37 am. "The aircraft had 105 passengers on board when the note was detected," it said.

Air India is yet to issue a statement on the matter.

(This story has not been edited by Mathrubhumi and is published from a syndicated feed.)