Pittsburgh police charged one man and were searching for a second after a shooting that left two people dead in a minivan in the Lincoln-Lemington neighborhood.

Police this morning said Allan Moorefield, 42, a passenger in the van, has been charged with two counts of homicide, one count of conspiracy and a firearms violation.

Police continued searching for the driver of the van, who fled after a high-speed chase with security guards about 6 p.m. yesterday. The guards caught Mr. Moorefield, who bolted from the vehicle at Apple Avenue and Grotto Street.

Christopher Brandyburg, 32, and William Walker, 34, both of Beaver Falls, were pronounced dead at the scene. Both were passengers in the van.

Police radio dispatches said one victim was shot in the neck and the other in the head, but the county medical examiner would not release the location of the gunshot wounds until completing the autopsies.

Police said security guards for Victory Security told them that they were checking a property on Apple Avenue when they heard shots fired in the area of the van. The guards, driving a blue sedan, chased the van through Homewood before it returned to Apple Avenue and stopped. Then the driver and a passenger, later identified as Mr. Moorefield, ran from the vehicle.

Police recovered a pistol in the van and said they believe the shots were fired inside the vehicle. The driver's side rear window of the minivan was shot out. The guards were armed but did not fire their guns, police said.

Police said the van was registered to an owner in Beaver Falls who was not one of the victims, and the vehicle was not reported stolen.

One witness, Tilavia Ledbetter, said she passed the two vehicles speeding in the opposite direction several blocks away. She saw the window of the van had been shot out and she saw a man slumped over in the back seat.

Dozens of neighbors gathered at the scene to watch as county medical examiners hauled the bodies away.

The double homicide was the third in the region in the past five days.

Early Friday, Sonsiarae Watts, 45, and Dahl Palm, 44, died of multiple gunshot wounds in the apartment where they lived on Valley Street in Stowe.

In Beaver Falls, police continue to investigate the shooting deaths Tuesday of Richard Warren Harper and his wife, Demetria, both 32, at their home on Second Avenue. Two of the couple's four children were home at the time and had been locked in a basement room before the shootings occurred.