Dhaka, Nov. 11 -- A Mumbai-bound Air India aircraft has been grounded under emergency conditions at Kolkata's Netaji Subhas Chandra Bose International Airport after a handwritten hijack threat was uncovered inside one of the aircraft's lavatories, NDTV reports.

Panic broke out across the airport on Wednesday morning as the aircraft, taxiing and preparing for take-off, was abruptly halted.

Sources told NDTV that the threatening message, warning of a potential hijacking, was scrawled directly onto a lavatory mirror.

Upon being informed of the threat, the flight's captain immediately contacted Air Traffic Control (ATC) to sound the alert.

In accordance with established emergency aviation protocols, the aircraft was directed to an isolati...