ATLANTA -- Police are working to track down the fourth suspect after a vehicle pursuit and at least one shot allegedly fired at officers.

Police said someone flagged down an officer claiming they had been robbed. Officers were able to identify the suspects' car.

Police confirmed early Thursday morning that four suspects led officers on a chase and ultimately fled into a wooded area of northwest Atlanta not far from Moores Mill Road. Police quickly set up a perimeter in the area.

Officials said two suspects have been arrested as of 2:30 a.m. A third suspect was arrested just before 5 a.m. One was tracked by a police K9 unit into a wooded area. The other was spotted by police hiding behind an area home.

While the details that led to the chase have not been released, police believe a suspect fired one shot at Atlanta police. A K9 later found the weapon.

Police continue to search for one more suspect.

PHOTOS | APD search for suspect after chase and shooting