Mumbai (PTI): A Chennai-bound Air India Airbus A-320 aircraft started moving towards the runway for take-off even before its door could be closed and with the aerobridge still attached but there was no mishap.

Airport sources said the flight(AI 640) was delayed for some time following the incident in the early hours of on Thursday. There were about 90 passengers on board the aircraft.

The incident occurred when a push-back vehicle, which takes the aircraft towards the runway for take-off, started moving before the aerobridge could be detached, they said.

All the passengers had boarded the flight and there was no damage either to the aircraft or the aerobridge, the sources said.

"The incident happened due to a miscommunication between the pilot and the push-back vehicle. Had the passengers been boarding the plane, there could have been some damage," the sources said.

Claiming it was a "minor" incident, an Air India spokesperson said that an internal inquiry had been initiated in the matter. The flight took off soon after the aerobridge was removed.