A 33-year-old man is in a critical condition in hospital after being attacked in what police are treating as an attempted murder in Paisley.
The attack took place at about 03:00 in the town's New Street, near to its junction with Weighhouse Close.
The victim was taken by ambulance to the Royal Alexandra Hospital where he is being treated for a serious head injury.
Police Scotland have appealed for witnesses.
Det Insp Stuart Lees, from Paisley police office, said: "Police inquiries are at an early stage to establish more details on the incident that took place and to identify those involved.
"Officers have been gathering CCTV footage and carrying out inquiries in the area."