A passenger has been apprehended following a hoax hijack threat that significantly delayed an Air India flight from Kolkata to Mumbai on Wednesday. The passenger was handed over to the Netaji Subhash Chandra Bose International (NSCBI) Airport Police Station, it said.The note, warning that the aircraft would be hijacked at 11.10 am on Wednesday, was discovered by a cabin crew member around 10.37 am, prompting security agencies to initiate mandatory safety checks.