A teenager has suffered serious facial injuries after being attacked on Argyle Street.
An unidentified man on a bike targeted the 19-year-old at the junction with Queen Street at around 5.50pm yesterday.
He was treated at the Royal Infirmary for his injuries.
This man is described as being white, between 18 and 22 years-old and of medium build. He was wearing a dark jacket, blue tracksuit bottoms, riding a bike that had a distinctive blue seat and he was carrying a draw string bag over his shoulder.
After the incident he cycled east down Argyle Street.
The victim of this assault was in the company of a 33 year old man who suffered minor injuries after being assaulted by a second unidentified man.
He is described as being white and wearing a khaki green tracksuit with a bubble jacket over the top and white trainers.
Detective Constable Paul Campbell, of Glasgow CID, said: "We are carrying out enquiries to identify these two men and would urge anyone who can help to come forward.
"If you were on Argyle Street around that time and saw or heard a disturbance then please get in touch.
"We would be keen to hear from anyone who may have mobile phone or dashcam footage of the incident."
Call 101 or Crimestoppers anonymously on 0800 555 111 with information.
