A Fairfax County man has been arrested after county police and federal agents found a cache of stolen weapons in his Fort Hunt area home, including sawed-off shotguns and guns with the serial numbers removed, police said yesterday.

In March, 18 shotguns and handguns were stolen from a home on Linton Lane in the Fort Hunt area. Mary Mulrenan, a police spokeswoman, said the guns were owned by a licensed collector.

Police found some of the guns last week after an incident at a party in the Belle View area, according to Capt. Michael A. Kline, commander of the Mount Vernon district station. The July 12 incident reportedly involved Christopher Isani, 19, of the 1500 block of Baltimore Road, who allegedly pistol-whipped a man with a revolver and robbed him of some cash, Kline said.

The victim was taken to the hospital with serious head injuries. Isani was arrested the next day and charged with malicious wounding, robbery and using a weapon during a felony.

After the arrest, police and agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives raided Isani's home. Kline said Isani "had been a person of interest" since the gun burglary in March, and investigators now had a chance to check his residence for evidence related to the pistol whipping.

The raid yielded seven guns stolen from the Linton Lane home, Mulrenan said, and investigators soon learned that four other guns had been sold to some of Isani's friends. Police recovered a sawed-off shotgun and a handgun from a 17-year-old Fort Hunt youth, who was arrested, and took another handgun from an 18-year-old Fort Hunt man, who has not been charged.

Seven guns from the Linton Lane burglary have not been found. Isani was charged with the burglary along with the other charges and is being held in the Fairfax jail without bond.

Police aren't certain what Isani was planning to do with the guns.

"There's only bad things that can be done with sawed-off shotguns. People saw off shotguns to do robberies and kill people. The same thing with filing off serial numbers," Kline said, noting that some of the guns had been illegally altered to erase their identifying numbers. "You're only doing that to cover up crimes."