Three men were taken to hospital after being found seriously injured at a house in Aberdeenshire.
Police were called to the property in Gladstone Road, Peterhead, late on Saturday night.
The men were taken to Aberdeen Royal Infirmary by ambulance.
Investigating officers are appealing to anyone with information to come forward.
A Police Scotland spokesperson said: “Around 11.40pm on Saturday, February 8, we received a report of three men being seriously injured at an address in the Gladstone Road area of Peterhead.
“They were taken to Aberdeen Royal Infirmary by the Scottish Ambulance Service.
“Enquiries are ongoing to establish the full circumstances of what happened.
“Anyone with information is urged to contact Police Scotland on 101.”