The tango area is a place where the flight is parked and is a little far from the runway area. The official said that CISF staff started the investigation by cordoning off the flight 100 meters away.

Earlier, Civil Aviation Minister Ram Mohan Naidu had said that making hoax bomb threat calls to airlines will be made a cognisable offence.

This wave of threats follows yesterday's incidents where 30 domestic and international flights operated by Indian airlines received bomb threats