Police are investigating disorder which broke out after a boxing event at Walsall Town Hall last night.
A 19-year-old man is in a critical condition in hospital and another man was treated for non-life threatening injuries.
The scene has been cordoned off while forensic enquiries are conducted and officers are speaking to witnesses to establish what has happened.
There was an incident last night in Walsall Town Centre that had tragic consequences. @wmpolice are investigating the circumstances.
Detective Inspector Ian Wilkins from force CID, said: “This was a large scale disorder which has resulted in a teenager receiving life threatening injuries. The event was attended by several hundred people and we are trawling CCTV to identify those involved."
“We are in the early stages of our enquiry and I would urge anyone who witnessed what happened and has not yet spoken to us to come forward.”
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Exclusive footage obtained by ITV News shows the moment crowds turned on one another after a boxing match in Walsall.