An Indian aircraft of the private airline Indigo made an emergency landing on Sunday evening at the Delhi Indira Gandhi airport, the NDTV reported.
The plane, which was on a scheduled flight from south Indian state Goa to New Delhi, made the landing after its pilot reported to the Air Traffic Control (ATC) that one passenger was misbehaving and creating trouble, Xinhua reported.
"The pilot said he suspected a hijacker on board and asked for priority landing," a top airport official said.
Airport officials said a passenger was possibly misbehaving, leading to the pilot's alert, but they did not rule out it could be a mock security drill.
The aircraft moved to the isolation bay at the Delhi airport after it landed.
Indigo Airlines said that all the passengers and the plane are safe and the passengers were allowed to disembark.
The airport security and Quick response teams have surrounded the aircraft at the isolation bay.