Vandals with BB guns shattered the windows of nearly 100 cars in four Fairfax County and Alexandria locations over the weekend, according to area police, who said they did not know whether the incidents were related.

Early Sunday morning, Fairfax County police said, someone drove through the Kings Park and Danbury Forest subdivisions, shooting randomly at the windows of 54 parked cars. All of the cars were empty, police said. Damage to them was estimated at $6,000.

Police said they were summoned to the area about 3 a.m. Sunday by residents who heard shots and the sound of breaking glass, but when they arrived, the vandals had fled.

In Alexandria, the rear windows of 41 cars also were shattered by BBs over the weekend. Police said the Alexandria incidents, which occurred on the residential streets near the Masonic Temple and in parking lots in the Landmark area, appeared related.

"There's no motive. It looks like one person drove and the other person just went through the streets shooting at cars," said John Kochensparger, the Alexandria Police Department's crime analyst.

Alexandria police arrested Robert Earl Anderson, 21, of 110 S. Whiting Street, on Saturday night when he was caught firing a BB gun in the Landmark area. At the time, Kochensparger said the police were unaware of the spree of auto vandalism and Anderson was charged with a firearm violation and released.

It is illegal to fire BB guns, which can be bought at some sporting goods and department stores, in a public place. Police estimated damage to cars in the Alexandria incidents at $6,000.