A 56-year-old cancer patient, Partha Pratim Nandi, was arrested for planting a hoax hijack threat note on a Mumbai-bound Air India flight in Kolkata. The incident caused a seven-hour delay and triggered security checks after the pilot alerted authorities. The incident involved Air India flight AI 2772, an Airbus A320 (VT-TNH), which was scheduled to depart for Mumbai on Wednesday morning.