ASHVILLE -- A woman and an accomplice broke into her family's home and killed her mother and brother before they were shot to death by her father, state police said Saturday.
The home invasion happened late Friday night in Ashville, about 40 miles southwest of State College in central Pennsylvania.
The father reported the shootings to police and wasn't injured, said Cody Williams, a communications operator at the state police barracks in Ebensburg.
He was at home with his wife and their adult son when his daughter and another person entered, Cambria County District Attorney Kelly Callihan told reporters at a news conference early Saturday. An argument ensued, resulting in gunfire, she said.
Three people were pronounced dead at the home, and a fourth person died at a hospital.
Autopsies are being performed, and the victims' names are being withheld, state police said.
There is no risk to the public, Callihan said, adding that authorities aren't commenting on a motive.
Police say the relationship between the daughter and the intruder remains unclear.
A news conference has been scheduled for late Sunday morning at the state police barracks in Ebensburg.