THE DISTRICT

Robbery shooting: A mother and daughter were shot and wounded during a robbery late Thursday in Northwest Washington. Police said they arrested three teenagers in the shooting.

The women were returning home to the 6600 block of Seventh Place NW when seven youths approached and robbed them of at least a purse, police said.

One assailant shot the mother, 55, in the hand and her daughter, 30, in the abdomen, police said. Neither woman suffered life-threatening injuries and they were being treated yesterday at an hospital, police said.

Officers arrested a 16-year-old and two 17-year-olds. The three boys, who live in Southeast, were charged as juveniles with assault with intent to rob while armed, said police, who are searching for the other assailants.

MARYLAND

HOMICIDES

* A 34-year-old man was found shot to death inside a vehicle early yesterday in the 1400 block of Nova Avenue in Capitol Heights, Prince George's County police said.

Police said Daryl N. Branison of the 1600 block of Brightseat Road in Landover was shot several times shortly before 3 a.m.

Police said they had neither a suspect nor a motive in the county's 120th slaying this year.

VIRGINIA

Man kills wife, self: An Alexandria man strangled his estranged wife and then hanged himself in his apartment, police said yesterday.

Police said Kelly Ross, 33, and Belinda Ross, 31, of Fairfax County were found dead about 12:30 a.m. yesterday at the apartment in the 5700 block of Reading Avenue.

Police said a family member had asked them to check on the couple, who were living apart.

Police entered the apartment and discovered the bodies. The medical examiner ruled that Belinda Ross died of strangulation and that Kelly Ross died of asphyxiation by hanging, police said.

Authorities are continuing the investigation. It is the second homicide in Alexandria this year.

Student arrested: A student at Osbourn High School in Manassas was arrested yesterday in the alleged pouring of a sulfur-based axle lubricant in the school's hallways and cafeteria Thursday as a prank, said Sgt. Tim Neumann, a Manassas Police spokesman.

Daniel Buckley, 18, of 10013 Willow Grove Trail was charged with one count of unlawfully releasing a noxious substance in a public place.

More than 20 people -- 16 students and five staff members -- were treated by the school nurse, mostly for headaches and nausea. No one was seriously injured or hospitalized.

The school, which has about 2,000 students, was evacuated about 9:45 a.m. when a sulfurous odor was noticed.

Classes resumed after the contaminated areas were cleaned.