A driver chasing after the gunman who shot his friend struck a responding police officer with his car, according to investigators.

The ordeal began Saturday at 5:14 p.m. when a gunman opened fire and an unidentified man was shot six times.

When the gunman started to flee the scene, a friend of the victim began to chase after him in his car, according to police. As he was chasing after the suspect, the driver struck a police officer who had just arrived at the scene of the shooting, investigators said.

"A friend of this male allegedly was going after the shooter and a police officer tried to stop the car," said Philadelphia Police Sergeant John Gushue. "This person struck the officer with the car."

The officer suffered scrapes and bruises to his arms and legs. He was taken to Episcopal Hospital and then later released. The shooting victim was taken to Temple University Hospital where he is in critical but stable condition.

The driver who allegedly struck the officer while chasing after the gunman was arrested and charged with aggravated assault with a vehicle on a police officer.

The initial gunman remains on the loose though police were able to recover his weapon at the scene. They have not yet revealed a description of the suspect.

This story is developing. Stay with NBC10.com for updates.

