Authorities say a 15-year-old Pennsylvania boy fatally shot his 18-year-old brother because both were interested in the same girl.

Dakota Thornton has been jailed and charged as an adult with criminal homicide and possessing an instrument of crime.

Dauphin County District Attorney Ed Marsico says Thornton shot his brother, Dominick, shortly before 2 a.m. Wednesday.

State police say Thornton told them he loaded a .410-gauge shotgun a couple minutes before the shooting.

A criminal complaint says Thornton told police he "shot and killed his brother over the fact that he was romantically interested in his brother's girlfriend."

The shooting occurred at their home in Williamstown, about 30 miles northeast of Harrisburg.

Online court records don't list an attorney who could comment for Thornton. He has a preliminary hearing April 27.