A 16-year-old boy was fatally wounded in a quadruple shooting Tuesday night in the city's East Germantown section.

The gunfire, apparently involving a shootout. erupted about 8:35 p.m. in the 100 block of East Pastorius Street, said Chief Police Inspector Scott Small.

The boy was shot once in the back. Police rushed him to Einstein Medical Center, where he was pronounced dead at 8:52 p.m.

He was identified Wednesday morning as Jai Custus, who lived on the block.

An 13-year-old girl reported to be Jai's sister was treated at Einstein for a graze wound to the right arm, police said Wednesday. Police had earlier said the girl was 11.

A 19-year-old man, who was shot in the torso and several times in the legs, was reported in critical condition after surgery at Einstein.

An 18-year-old man was treated for a graze wound to his torso at the hospital, police said.

When police arrived, one of the victims had run around the corner to Tulpehocken Street and collapsed, Small said. Two of the victims ran into nearby houses. The girl was found outside.

Police took all four victim to Einstein in their patrol cars.

Shell casings were found on both sides of the street, indicating "possibly some kind of shootout between two people or two groups," Small said.

"The crime scene stretches a whole city block," Small said.

Police had no information on motive or possible suspects, Small said.