ROCKVILLE, Md. -- Police said Saturday night that forensic evidence has linked the shooting of a woman in Virginia to the slayings in Maryland and Washington.

Maj. Howard Smith of the Spotsylvania County, Va., Sheriff's Office said ballistic tests have matched the bullet that wounded a woman yesterday near Fredericksburg, Va., to the shootings in Montgomery County Md., and Washington on Wednesday and Thursday.

The 43-year-old Spotsylvania woman was shot in the back in a parking lot at a Michael's craft store yesterday about 2:30 p.m.

She remains in stable condition in Inova Fairfax Hospital. Authorities said she is a stay-at-home mother of two who has been questioned extensively by the police.

Six people were killed in the apparently random shootings in Maryland and the District.

A man arrested Saturday in Fairfax, Va., is not a suspect in the shootings, police said.

Tests conducted by the Bureau of Alcohol, Tobacco and Firearms confirmed that the same weapon was used to kill at least four of the six victims of a sniper spree over the past three days in Montgomery County, Md., and Washington. Tests were still under way to determine any links to additional shootings in Maryland.

No arrests had been made in the scattered shootings that began Wednesday.