A Lufthansa Airbus A330 and a United Express commuter plane collided on a taxiway near the A gates at Dulles, says Metropolitan Washington Airports Authority Spokesperson Rob Yingling.
A spokesman for one of the airlines says a wing clipped the tail of another plane.
There are no injuries.
The NTSB is investigating the incident.
A spokesman for Pinnacle Airlines, the parent company of Colgan Air, says the United Express airplane, Flight 3912, was from Pittsburgh to Dulles and operated by Colgan Air. The aircraft is a Bombardier Q400.
Here's a statement from Pinnacle:
• On Friday afternoon, 8/10, a Lufthansa aircraft clipped the tail of Colgan flight 3912 operating as United Express (PIT-IAD) during taxi to the gate at Dulles International Airport (IAD).
• The Captain of the Colgan Q400 aircraft was able to continue to the gate, and all 68 passengers safely deplaned. There were no reported injuries.
• We are investigating the incident and are working with both the FAA and NTSB.
There were 183 people on the Lufthansa flight.