A HIT-and-run on the M4 has left a man with multiple broken bones.

The incident happened on the hard shoulder westbound near to Leigh Delamere Services on Saturday morning at around 6am.

The 30-year-old victim was checking the roof box on his car when a passing car smashed into him, breaking his leg, ankle and elbow, and causing a 12-inch cut to his arm.

Despite his injuries he managed to get into his car and drive to Cardiff where his colleagues called an ambulance.

The driver of the other vehicle failed to stop and help at the scene.

PC Andy Lee, from Tri-Force Roads Policing, said: "At this stage we are not sure where exactly the collision occurred, but we know it was on the westbound carriageway and we believe it may have been close to the Leigh Delamere services.

"The injured man was driving a silver Kia Ceed, and he was hit some time between 5.30am and 6am on Saturday morning.

"Do you remember seeing this car parked on the hard shoulder somewhere on the westbound hard shoulder? Were you the car that collided with him and perhaps you didn't realise the extent of his injuries?

"We want to hear from anyone with information, including anyone who may have dash cam footage which could assist with our enquiries."