India, Nov. 11 -- A hijack threat note found in the washroom of an Air India flight scheduled to travel from Kolkata to Mumbai on Wednesday morning triggered a security alert at Kolkata airport, prompting authorities to move the aircraft to an isolation bay for inspection.Buy Maps

The flight was scheduled to depart at 10.20 am. The note, which threatened that the aircraft would be hijacked at 11.10 am, was discovered in the washroom shortly before departure, Kolkata airport director Vikram Singh said.

Following the discovery, all passengers who had boarded the aircraft were deboarded, and the plane was moved to an isolation bay as a precautionary measure.

Security protocols were immediately activated, with officials initiating a thoro...