Passengers aboard IndiGo flight 6E 451 from Bengaluru to Lucknow experienced panic after a hijack threat note was found. The note was discovered in the aircraft toilet around thirty minutes after take-off, prompting immediate action. Cabin crew alerted the pilot, who decided to return to the Kempegowda International Airport for security checks. Security agencies conducted a thorough search, declaring the threat a hoax after ninety minutes.