WASHINGTON - Five people have been arrested in Washington after at least one person opened fire on police, and a police spokesman says there's no indication it was a "planned attack on police."

No injuries were reported.

The incident early Tuesday follows recent protests over police killings of black men in Louisiana and Minnesota and the fatal shooting of five police officers in Dallas.

Police say a system that detects gunshots brought officers to southeast Washington. When officers arrived in marked police cruisers, people inside an SUV began shooting at them. Police spokesman Dustin Sternbeck says police returned fire and the car's occupants refused to come out. Three women and two men ultimately surrendered.

Sternbeck tells WTOP "we do not have information that this was a planned attack on police."