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.