A Prince George's County police officer shot a knife-wielding woman in the right arm yesterday after ordering her to stop attacking a man identified as her boyfriend, police said.

Barbara Jean Jones, 44, was shot by Pvt. James B. Harrison just before 6 a.m. in the bedroom of her home on Emerson Road in West Lanham Hills, police said. Jones was charged with assault with intent to murder.

Harrison, a three-year member of the county police force with prior police experience, has been put on administrative leave pending further investigation.

Police said they responded to a neighbor's call that a woman was stabbing and slashing a man in the front yard of Jones's home. When they arrived, police said, they found a woman attacking a man in a rear bedroom at the West Lanham Hills address. A 3-year-old child was also in the room, police said. Police said Harrison told the woman numerous times to drop the weapon before firing one shot.

Minutes earlier, police had left the home after resolving a dispute between Jones and a taxi driver over a $12 fare.

Jones was taken to Prince George's Hospital Center and listed in stable condition. The stabbing victim left the scene to seek medical treatment on his own, police said.