D.C. Police use small craft to patrol the Potomac River.
A District of Columbia police boat struck at least two vessels on the Potomac River near Georgetown, causing one smaller boat to partially sink.
Witnesses say a harbor patrol boat was making a U-turn Saturday evening about 7 p.m. when it struck at least two other boats docked at the Georgetown waterfront. No one was hurt in the crash.
A YouTube video taken by a witness shows the boat turning quickly with its sirens on before striking the other craft.
One boat was flipped on its side and was left partially underwater along the waterfront overnight.
The U.S. Coast Guard and D.C. police responded to the scene and have launched an investigation. The investigation continues to determine what caused the crash.