A District policeman suffered a fractured leg yesterday morning when two men he was chasing on foot jumped into a getaway car and tried to run over him, police said.

Officer Grover D. Carson, 32, said he fired two shots at the car before it hit him in the leg, knocked him to the ground then doubled back to finish him off. Carson said he managed to get out of the way the second time.

The incident began at 2:30 a.m. when Carson, who was on routine patrol, noticed a man lying in a pool of blood at First and Atlantic streets SE, according to police. A crowd stand nearby was calling for help when two other men, one holding a crowbar, began to run.

Police said Gregory Crawford, 27, of 611 Forester St. SE and Dwaine Witten, 26, of 1120 Kennebeck St., Oxon Hill, were arrested when their car was blocked by another police cruiser responding to Carson's call for assistance.

The two were charged with assault in connection with injuries suffered by Carson and a yet unidentified man who was hospitalized with head wounds.

Police said the disturbance began during a dispute over Witten's estranged wife.