Updated

Police are searching for at least two suspects in a shooting at a backyard party that left five people dead and three wounded in suburban Pittsburgh.

Four women and a man were killed late Wednesday during the party in Wilkinsburg. Two men are in critical condition and a woman is stable.

Allegheny County police say the cookout was taking place at the rear of a home on Franklin Avenue when the gunmen appeared just before 11 p.m.

Lt. Andrew Schurman of the Allegheny County homicide unit says they opened fire in an ambush-style attack. He says gunshots came from two distinct locations, but police don't believe anyone at the party fired back.

Four of the victims died on the back porch. The other died at a hospital.

A motive isn't immediately known.