Updated

Authorities say three men have been found shot to death in a home in northeast Philadelphia.

Officers responded just before 11:30 p.m. Saturday to a report of a person screaming at a residence in the Holmesburg section of the city.

A police spokesman says three men in their 30s were found in the first-floor apartment with gunshot wounds to the head. All were pronounced dead minutes later.

Officials told reporters that a girlfriend of one of the victims found the bodies. They say it's unclear whether more than one person was involved.

WCAU-TV reports that a sign on the door of the home reads "Trespassers will be shot. Survivors will be shot again."

Police have not announced any arrests in the case.