India, July 22 -- The auxiliary power unit (APU) of Delhi-bound Air India flight AI-315, flying from Hong Kong, caught fire shortly after the aircraft landed at the Indira Gandhi International Airport on Tuesday, the airline said.

The fire was detected while passengers were exiting the plane.

Air India said there was "some damage" to the aircraft - a twin-jet Airbus A321 - which has been grounded pending an investigation. The Director-General of Civil Aviation has been notified.

Air India's safety standards have come under scrutiny after the June 12 Boeing Dreamliner crash in Ahmedabad, in which 260 people died and 81 were injured.

Of the 242 people on board the Ahmedabad to London plane, only one man had survived. The rest of the cas...