A Jet Airways shuttle bus rammed into a stationary Air India flight at Kolkata airport on Tuesday, apparently after the driver dozed off. There were no passengers in the aircraft when the incident took place around 5.25 am. The aircraft, said to be worth Rs 400 crore, suffered extensive damages, according to AI officials.Aviation regulator DGCA has ordered a probe into the incident. “Momin Ali, the driver, had been on night duty. He said that he had fallen asleep and deviated from his route,” said airport director A K Sharma, adding that Ali was not driving under influence.The aircraft was parked at bay no. 32 and was preparing to fly to Silchar when the bus hit it near the left wing. The accident prompted AI to cancel two flights to the north-east. While AI called it a “gross act of negligence”, Jet said the coach accidentally collided with the aircraft.