Police were called to reports of men causing trouble in a convenience shop in Upper Dean Street shortly after 10.30pm last night. Moments later, it is believed there was a fight in the street – where one man was punched.
The man suffered a serious head injury and is currently in hospital in critical condition. Despite extensive enquiries, police have not been able to identify him yet – but have said he's black and aged between 40 and 50 years old.
Following enquiries, officers believe there may have been been six to eight people who ran off after the attack through the market area, in the direction of St Martins Church.
Detective Inspector Richard Marsh, from West Midlands Police's Force CID, said: "At this stage the motive of the attack is unclear.
"We are working hard to determine what happened and who was responsible. I would urge anyone with any information who hasn’t already spoken to us, to do so as soon as possible.
“We also need to know who the seriously injured man is so we can inform his family and friends. We understand reading this may be distressing, but if you think you know who it is please do get in touch."
Anyone with information is urged to call West Midlands Police on 101, quoting log number 4475 of October 5.
Alternatively, witnesses can call Crimestoppers anonymously on 0800 555111.