The wing tips of two taxiing planes at Mumbai Airport collided.
The incident happened when a wing of an IndiGo aircraft came in contact with the wing tip of a, reportedly stationary, Kuwait Airways plane.
According to Times of India, a passenger who saw the incident alerted the IndiGo crew. The IndiGo Airbus A-320 (VT-IFP)'s sharklet, the curved portion at the tip of an aircraft wing, was damaged and the plane was grounded.
In a statement, IndiGo said: "IndiGo confirms that the wing tip of its Airbus A-320 aircraft came in contact with the wing tip of the Airbus A-330 - a wide body aircraft of an international operator -- while taxiing at the Mumbai airport Wednesday morning. At about 5:45 am, while the aircraft of this international airline was taxiing toward the parking stand, at the same time an IndiGo flight (6E 207) was taxiing to depart to Jaipur from taxi way 'N' and 'W' respectively.... under air traffic control's (ATC) instruction."
Kuwait Airways' spokesman Andrew Chupeau said in a mail: "As the Kuwait Airways A-330 was in a holding/stationary position when the incident took place, the IndiGo A-320 came into contact with the Kuwait Airways A-330.... Kuwait Airways can confirm that no passengers were at risk; however, it is understood that the wingtip of an A-320 aircraft scratched Kuwait Airways' A-330 (9K-APA) left outboard flap. Kuwait Airways is cooperating fully with both the Indian civil aviation authorities and Kuwait's DGCA, in order to investigate this incident, and further details will be issued as soon as more information becomes available." The flight, KU 301, had flown into Mumbai from Kuwait City.
After the incident, all passengers of the IndiGo fligt were safely accommodated to the other aircraft.