A man is recovering in hospital after being the victim of a "sustained and violent attack" in Renfrew.
The 45-year-old was walking along the town's Houston Street, at about 1300 BST on Sunday, when a man attacked him with a blunt instrument.
He was then chased into nearby Wilson Street where the attacked continued. The victim is in a stable condition in Paisley's Royal Alexandra Hospital.
Police have appealed for witnesses to the attack to contact them.
The suspect is described as white, about 45 years old, 6ft tall, of heavy build, with short black hair and a tanned complexion.
At the time of the attack he was wearing a black tracksuit.
Det Sgt Drew Piper, of Strathclyde Police, said: "This man has suffered a sustained and violent attack and it is imperative that we trace the person responsible.
"I would appeal to anyone who was in the area of Houston Street and Wilson Street yesterday afternoon who may have witnessed the incident, or heard a disturbance, to come forward to police."