A suspected hijacking threat triggered a major security alert at Kolkata airport on Wednesday morning after the pilot of an Air India flight bound for Mumbai alerted Air Traffic Control (ATC) about a possible hijacking threat shortly before takeoff.

The aircraft, an Airbus A320neo operating as flight AI 772, was subsequently moved to an isolation bay, where security agencies launched a comprehensive search operation.

According to preliminary information, a handwritten note warning of a possible hijacking was discovered inside the aircraft shortly before departure. Sources indicated that a message related to a hijacking threat may have been written on a mirror inside one of the aircraft's lavatories.

After the note was discovered, the pilot immediately alerted ATC, prompting airport authorities to activate security protocols. However, neither Air India nor the airport authorities have officially confirmed the reported location or contents of the message.

Following the alert, the aircraft was taken to an isolation bay for detailed security checks. Security personnel and other agencies rushed to the spot to investigate the threat and ensure that there was no security risk.

The aircraft was placed under tight security, with multiple agencies coordinating the inspection as part of the precautionary measures.

There were 93 passengers and five cabin crew members on board the Kolkata-Mumbai flight when the security alert was triggered.

Preliminary assessments suggest that the threat may have originated from a specific situation involving one of the passengers. However, the circumstances surrounding the discovery of the note and the identity of the person responsible remain unclear.

A detailed investigation is underway to establish the authenticity of the threat and determine whether it was a hoax or a genuine security concern.