Kolkata : Security was tightened at Kolkata’s Netaji Subhas Chandra Bose International Airport on Wednesday morning after a suspected hijack threat was discovered aboard a Mumbai-bound Air India flight carrying 147 passengers.

The incident involved Air India Flight AI 772, which was preparing for departure around 10:20 AM on November 11, 2026. According to reports, cabin crew members noticed a threatening message, allegedly written in lipstick on a lavatory mirror, warning of a possible hijack.

The crew immediately alerted the pilot and Air Traffic Control (ATC), prompting an emergency security response.

Aircraft Shifted to Isolation Bay

Following established aviation security procedures, the pilot moved the aircraft to a designated isolation bay for detailed inspection.

All 147 passengers were safely deboarded and escorted to the terminal. Security agencies, including the Central Industrial Security Force (CISF), airport security teams, fire personnel and a bomb disposal squad, were mobilised.

A comprehensive search of the aircraft was initiated, covering the passenger cabin, luggage, cargo compartments and other critical areas.

CCTV Footage Under Scanner

Authorities have launched an investigation to identify the person responsible for the threatening message.

Investigators are examining airport CCTV footage, passenger boarding records and flight manifests to establish who may have written the message.

Passengers are also being subjected to additional security screening and questioning as part of the investigation.

Flight Operations Await Security Clearance

Flight AI 772 remains on hold pending completion of the security inspection and clearance from the concerned authorities.

The incident triggered heightened security measures at the airport, even as officials continued efforts to establish the credibility of the threat.

Further details are awaited as the investigation progresses.