Shocking scenes of violence unfolded after the Bare Knuckle Fighting Championship hosted its first event in Scotland, which was attended by UFC icon Conor McGregor

Conor McGregor has been slammed by cops for proposing a bare knuckle boxing match – between Celtic and Rangers fans. A mass brawl broke out on the streets of Glasgow after a bare knuckle fighting championship event was held at the city's OVO Hyrdro.

The Controversial cage fighter – a co-owner of Bare Knuckle Fighting Championship (BKFC) – was in attendance at the event, which was headlined by former Rangers hooligan Sean Weir.

McGregor, 38, said afterwards: "Tonight is the night of the Scots. Tonight of Rangers, maybe. I don't know what's the situation with Celtic. Who can fight Sean Weir? We can make it a Celtic versus Rangers.

"Okay we want Ibrox and Ibrox wants us and this crowd. Leave that with me in the next day or two and I will have some names for you."

Weir, 34, beat Leigh Cohoon in the opening round to secure the British light heavyweight title. But street violence erupted amongst departing spectators after the event.

More than 20 police vehicles and a police helicopter converged on the area. Three officers were hurt, two of them requiring medical treatment, as they responded to the disorder.

Police Scotland said two men, aged 32 and 27, had been arrested and charged with offences including assault, obstructing police and threatening and abusive behaviour.

And David Kennedy, General Secretary of the Scottish Police Federation, condemned the proposals for an Old Firm fight night, the Daily Record reports.

He said: "The scenes witnessed outside the Hydro on Saturday night were utterly disgraceful. Police officers were subjected to violence simply for doing their jobs, and that is completely unacceptable.

"Against that backdrop, the suggestion from Conor McGregor of promoting a 'Celtic versus Rangers' bare-knuckle boxing contest is, at best, irresponsible and, at worst, dangerously provocative. Glasgow has spent decades dealing with the consequences of football-related violence and sectarian tensions.

"The very last thing this city, or Scotland, needs is someone with considerable public profile seeking to turn those historic rivalries into a commercial spectacle built around fighting. Our police officers should not have to face violence because others see confrontation as entertainment."

Former police chief Martin Gallagher also said he was appalled by the prospect of an Old Firm bare-knuckle bout. Martin, who retired at the rank of Superintendent and is now working as a security consultant, said: "The scenes outside the Hydro at the weekend show that the last thing Glasgow needs is bare knuckle fighting.

"Throw into the mix the sectarian tensions that bubble below the surface, and in recent years have been spilling over at Celtic and Rangers fixtures, you do not need to own a crystal ball to know the trouble that will arrive with any Celtic/Rangers 'fight'.

"Such a billed event will attract to Glasgow the worst individual's society has to offer. There will be chaos for the city and carnage for the cops. I have no doubt that whatever bout took place in the arena would thereafter be refought a hundredfold on the streets. Is that really what we want in 21st century Scotland?"

Arena bosses are said to be unlikely to stage another bare knuckle event after the violent scenes on Saturday night.

A spokesperson for the SEC, which manages the Ovo Hydro, said: "Saturday's event was attended by around 9,000 people and was delivered safely within the venue, following extensive planning with the promoter, Police Scotland and other relevant parties.

"We are aware of a number of incidents outside the venue after the event and we are supporting Police Scotland with their enquiries."

Scottish First Minister John Swinney condemned the Saturday night violence. He said: "There is absolutely no place for violence on the streets of Scotland, on any occasion, and the events at the weekend outside the Hydro were completely and utterly unacceptable."

Scottish Labour Shadow Justice Secretary Pauline McNeill said: "The violence witnessed in Glasgow over the weekend was completely unacceptable, and those involved should be ashamed of bringing this trouble to our city. Hardworking police officers should be supported to carry out their jobs and keep communities safe."

Scottish Conservative justice spokesman, Stephen Kerr MSP stated: "Glasgow has witnessed far too much violence and disorder over the years, and the last thing we need is high-profile figures wading in with remarks like this. "The perpetrators behind these attacks on police officers must be hunted down, prosecuted and face the full force of the law."

A Bare Knuckle Fighting Championship (BKFC) spokesperson said: "BKFC is aware of an incident outside the OVO Hydro following Saturday night's sold-out event. KFC strongly condemns these scenes and will continue to work closely with Police Scotland and our venue partners on the safety and security for future events in Scotland."