A Prince William County police officer was run down and seriously injured early yesterday when he tried to arrest a drunk-driving suspect after a chase through Fairfax and Prince William counties, police said.

Sgt. Harry M. Hittle, 42, of Nokesville, a 14-year veteran of the Prince William force, was listed in stable condition at Potomac Hospital in Woodbridge with left leg and skull fractures.

Prince William police charged the suspect, Michael H. Sharp, 38, of Richmond, with malicious wounding of a police officer, felony hit-and-run, driving while intoxicated and speeding to elude. Fairfax police also charged him with driving while intoxicated, reckless driving and speeding to elude. Sharp was held yesterday in a jail in Manassas on $27,000 bond, police said.

Police gave this account:

They first saw the car about midnight speeding south on U.S. Rte. 1 and followed it into Prince William, where an officer tried to stop it.

The car finally was stopped near Marumsco Plaza in Woodbridge. When Hittle walked toward the car, Sharp pulled his car forward and it knocked the officer about 20 feet. Sharp then fled south on Rte. 1.

About three miles away, Sharp's car ran into the rear of a tractor-trailer near Cardinal Drive and Rte. 1. He was treated for minor head injuries.