SEOUL, Korea, Republic Of – A Korean Air Lines Co. plane returned to Yangon International Airport on Friday after officials discovered it had clipped another aircraft while taxiing.

The airline said in a statement that Flight 472 bound for Incheon, South Korea returned to Myanmar’s biggest city Yangon not long after midnight.

The jet carrying 134 passengers and 11 crew was about 20 minutes into its flight when air traffic control informed pilots of the collision.

Korean Air said one of the plane’s winglets hit the tail of a parked Bangkok Airways aircraft but pilots did not notice the incident because of the darkness.

It said no alarm was set off by the collision, which was seen by a member of ground staff who notified the control tower.

There were no injuries.

Korean Air said passengers boarded another flight early Friday afternoon and would reach Incheon some 13.5 hours later than originally scheduled.

Authorities in Myanmar are investigating the incident.