A road rage suspect who hit a man with a sledgehammer is being sought by police in Philadelphia.

Footage of the attack was captured on CCTV and posted online by the city's police department.

It shows two vehicles pulling into a car park. The assailant then leaves his pickup truck with a sledgehammer and smashes the driver's side window of an SUV.

He then smashes the driver's side window of an SUV.

A passenger in the vehicle opens his door and falls out as the driver attempts to speed away.

The attacker then hits the passenger with the sledgehammer as he limps off to get back into the SUV.

As the vehicle drives away the man with the sledgehammer smashes its rear window. The man then gets back into his pickup truck and drives off.