A gunman opened fire on cops during a traffic stop in Brooklyn Wednesday night and then rammed his car into two of the officers, cops said.

Police were attempting to make the stop in Gowanus at around 10:30 p.m. when the driver backed into the patrol car and fired a weapon at an officer approaching the vehicle, according to police sources.

One cop fired one round back at the suspect.

The driver sped off from the scene and struck two other plainclothes cops, sources said.

Neither officer was seriously injured and both refused medical attention.

None of the cops were struck by gunfire. The suspect remains at large and the investigation is ongoing.