A man is in a serious condition in hospital after being knocked down in a hit-and-run in Renfrewshire.

The 21-year-old was struck by a silver or grey Audi A1 as he was crossing Greenock Road, Bishopton, at about 9.50pm on Saturday.

Police said the car did not stop and continued driving towards Renfrew.

The injured man was taken to the Royal Alexandra Hospital in Paisley, where staff describe his condition as serious but stable.

Officers are said to be following a "number of lines of enquiry" and have appealed for any witnesses to contact them.

Sergeant Kenny Malaney said: "The car failed to stop after it struck the pedestrian and extensive enquiries are ongoing to trace the car involved and its driver, however officers are following a number of lines of enquiry in relation to this incident.

"I would ask any witnesses to the crash, who have not yet spoken to police to come forward, and I would also ask anyone who may have seen a silver or grey Audi A1 being driven in the local area around the time of the crash on Saturday night to contact the divisional road policing unit at Greenock through 101."