Ly said there were no injuries and the incident caused minor damage. The crash occurred about 12:16 p.m., between 7th and 8th streets Northeast. It appeared the bus involved was an eastbound X2.
Inquiries about resulting Metrobus delays or traffic congestion were not immediately answered.
DDOT spokesman Terry Owens said the streetcar was running simulated service with only an operator on board. Owens said the incident was minor, but added that assessing the cost of damage would take some time. The collision caused minor damage to both vehicles, he said.
The scene has been cleared, Owens said, and simulated streetcar service has resumed. D.C. Police are investigating the cause of the crash.