Police are appealing for witnesses in connection with an assault at a bar in Galashiels last night.
The incident happened at around 9pm in the Glue Pot on Overhaugh Street.
Police said a 25-year-old man had gone to the toilet and upon entering noticed the male suspect who engaged him in conversation before attacking him.
The man fell to the ground and members of the public then intervened in order to separate the pair.
The Scottish Ambulance Service was called and transferred the man to the Borders General Hospital where he received treatment to a head injury before being discharged.
The suspect left the premises after the attack and police are keen to speak with anyone who has information that can assist with their ongoing investigation, especially those who helped break-up the altercation.
Detective Constable Callum Peoples of Police Scotland said: “We are pursuing various lines of inquiry in relation to this incident which, at present, appears to have been a completely unprovoked attack.
“I urge anyone who was in the pub on Saturday and who has information that can assist us to contact police on 101 or speak to the registered charity Crimestoppers on 0800 555 111.”