A 2-year-old Anne Arundel County girl was in very critical condition yesterday after being accidentally shot in the head with a rifle by her baby sitter's 10-year-old son, county police reported. Police said they believe the boy shot Keosha Akua Logan while putting away the gun, which the girl found under a sofa.

Police spokesman Richard Molloy said the baby sitter's husband had taken out his rifle Saturday night after hearing prowlers in the back yard of his town house. After finding nothing, the husband reported the incident to police, tucked the rifle under the sofa and apparently forgot about it, Molloy said. He said the rifle, a type commonly used for target practice, had one bullet in it.

The girl's father, Lewis Logan, took her to the baby sitter's at 6 a.m. yesterday, and the baby sitter, of Glen Burnie, was in her bedroom changing her clothes 45 minutes later when the shooting took place in the living room, Molloy said.

Police said they believe the girl, whose family lives on Old Stage Road in Glen Burnie, found the .22-caliber rifle while playing on the living room floor. The baby sitter's son, who was described by neighbors as "a good little kid," took the rifle, put it over his shoulder, and was walking away from Keosha toward a closet when it fired, Molloy said. No charges have been filed.

Molloy said the baby sitter had been caring for Keosha on weekdays for the last two weeks after the girl's parents found her services advertised in a newspaper. Keosha was the only child the woman was baby-sitting with at the time.