A McLean woman was allegedly bound late Saturday night and placed in a closet in her home where a fire was then set, and the woman's 18-year-old son has been arrested and charged in connection with the blaze, Fairfax County fire officials said yesterday.

The woman was reported uninjured.

Fire officials said they charged the son, John K. Patrick, of the family home at 1017 Galium Ct., with burning an occupied dwelling at night. Authorities said he was being held last night in the Frederick County, Md., jail as a fugitive from Fairfax County.

According to county fire officials, the man's mother, Edna Patrick, was allegedly bound and placed in a closet beneath a stairway. Apparently motor oil was then poured on stairs and elsewhere in the house, and a fire set with the aid of cardboard boxes, a county fire official said in a recorded statement to the news media.

Officials said the woman escaped from the house, ran to a neighbor's home and reported the blaze. After receiving the call shortly after midnight, fire officials said they went to the house and extinguished the fire. Damage was estimated at $25,000.

Authorities said that the suspect was being held last night in the Frederick County jail in lieu of $100,000 bond pending an extradition hearing today.

County Sheriff Robert Snyder declined yesterday to say how Patrick came to the attention of Frederick authorities.