State police arrested and charged a 17-year-old Francis Scott Key High School student as a juvenile Wednesday night after a shotgun blast was fired into the bathroom window of a 16-year-old girl police described as his former girlfriend.

The girl, who lives in the 1800 block of Bowersox Road near New Windsor, told police she was in the second-floor bathroom of her home at 10:47 p.m. when the window was shattered and the siding around the window was peppered with buckshot.

Police, who were given the description of a possible suspect, found the Taneytown youth in his automobile within a mile of the girl's house. They said they found a 12-gauge shotgun in the car.

The youth was charged with reckless endangerment, assault, malicious destruction of property and possession of a deadly weapon after police consulted with the state's attorney's office. He was released to his mother pending a trial in Juvenile Court.

Investigators said the shotgun blast was fired from a road at the side of the girl's home.

Damage to the house was estimated at about $1,200.