Two men were attacked from behind “for no reason” in South Lanarkshire last night.
Detectives have launched a probe after the attack on Machan Road in Larkhall.
The duo, aged 34 and 36, were walking home around 00.50am, when they passed a man and a woman.
Joined by four other men, the man they passed proceeded to attack the men from behind.
The victims were taken to Wishaw Hospital, where the 36-year-old remains for further treatment.
Officers are continuing door-to-door enquiries and are checking relevant CCTV footage for any information on the group of suspects.
Detective Constable Christine McLanachan said: “These two men have been on a night out and making their way home when they have been attacked for no reason, that is clearly unacceptable and it is imperative we trace the men responsible.
“The four other men must have been in the area or very near to the area as they arrived pretty quickly to participate in the attack.
“I am appealing to members of the public for their help, if you saw anything or know anything regarding this crime, please do get in touch with us.
“I’m sure there will be information circulating in the area regarding this incident and those responsible and I am urging local people to pass this information on. We will use that information to find the men responsible for this senseless crime.”
Anyone with any information is asked to call Police Scotland via 101, quoting incident number 235 of September 12, 2020. Alternatively, please call Crime stoppers on 0800 555 111 where you can give your information in confidence and anonymously.