EAST ROCKHILL TWP., Pa. -

Authorities in Bucks County are investigating an apparent murder-suicide involving an elderly man and his mentally-handicapped daughter.

Police say the victims' bodies were found inside their home on Clymer Street in East Rockhill Township around 9 Saturday night.

Officials say 78-year-old Thaddeus Swierzewski shot his daughter-- 59-year-old Mary Swierzewski--  twice before turning the gun on himself.

Officials say he had threatened to kill himself and his daughter in the past.