About ten panels of the false ceiling near bay number 28 came crashing down around 3.30 am. However, none was injured in the incident, airport sources said.
A statement from Airport Authority of India said the slabs measuring 2 feet x 2 feet fell in the international arrival area, which is due for renovation.
"At the time of the incident there was no movement of passengers and the place was cleaned in an hour," it said.
Since March 31 alone, three incidents of collapse of granite slabs and glass panels had been reported at the new terminals.
However, today's incident occurred at the old international terminal which is still in operation, catering to arrivals, as the new one was handling only departures.