THE REGION

Officer arrested: A D.C. police officer was arrested in Fairfax County yesterday after she allegedly stabbed a male acquaintance in the upper body, police said. The victim was not seriously injured.

The incident occurred about 6:30 a.m. in the Engleside area of southern Fairfax, just east of Fort Belvoir.

Police declined to release an address because the incident involved a police officer.

A 33-year-old man told police that he had been in a heated argument with Juanita Brown, 38, and that he was stabbed. The victim declined medical treatment.

Brown was charged with malicious wounding and was released after posting $5,000 bond. She is a 14-year veteran of the D.C. police, assigned to patrol the 3rd District. Brown has been placed on administrative leave with pay pending the outcome of the case, said D.C. police spokesman Joe Gentile.

MARYLAND

Sexual assault: An Upper Marlboro woman was sexually assaulted yesterday after an armed man knocked on her front door and then forced his way inside. It was the third incident of its kind in five weeks, authorities said, heightening fears that a serial rapist is on the loose.

The woman was sexually assaulted in the same neighborhood where two others have been raped since Feb. 13, said Cpl. Diane Richardson, spokeswoman for the Prince George's County police.

Richardson said the attack occurred in the 9300 block of South Moore Drive about 3 p.m. As in the other attacks, a man forced his way into the woman's house, sexually assaulted her and then fled on foot. He was wearing a black hooded sweater, a black mask and dark pants, Richardson said.

THE DISTRICT

Carjacking in Northeast: A carjacker shot and wounded a driver in Northeast Washington yesterday and then pushed the man out of his black Jeep Cherokee before driving off in the vehicle, police said.

The victim was shot in the arm in the 400 block of 61st Street NE just before 5:30 p.m., police said. The vehicle had Alabama plates.

VIRGINIA

London jogging death: Detectives with Scotland Yard yesterday released a second suspect in connection with the slaying of Falls Church artist Margaret Muller, who was fatally stabbed last month as she jogged in an East London park.

The man's identity was not released. A police spokesman said the man was allowed to return home while the investigation continues.

Earlier this month, an 18-year-old Hackney man was detained and then released in the case. No charges were filed in either instance.

Muller, 27, went to England in 1998 for postgraduate studies.

Compiled from reports by staff writers.