Dereck Chisora and David Haye may face life bans for their Munich brawl says the British Boxing Board of Control General Secretary, Robert Smith.

"It's a possibility," Smith told BBC Radio 5 live. "The board have many powers. They can fine, they can suspend and they can withdraw a licence."

Haye and Chisora clashed after Chisora's defeat by defending WBC heavyweight champion Vitali Klitschko.

German police want to question Haye after releasing Chisora without charge.

The British Boxing Board of Control (BBBofC) said a misconduct investigation had been opened into Chisora's "behaviour...prior, during and after" the Klitschko fight.

"A further statement will be issued once the stewards have decided on what action will be taken," the BBBofC said.

"With regard to Mr David Haye, Mr Haye is not a licensed boxer with the British Boxing Board of Control and therefore no longer under our jurisdiction."

Although Haye has retired from the sport, the board could choose to effectively ban him by denying him a licence if he seeks to fight again.

Chisora and his trainer Don Charles had been arrested at the city's airport following the scrap at a post-fight news conference late on Saturday night.

Although local officers want to contact Haye, Chisora's promoter Frank Warren says he understands the former WBA champion has returned to the UK.

The Metropolitan Police told the BBC they have had no contact yet from German police in relation to Haye.

The scenes unfolded after Haye showed up at the news conference to confront Klitschko, who he believes changed his mind on a potential fight between the pair.

But that sparked a verbal exchange with Chisora and the pair squared up to each other before a brawl ensued.

Chisora accused Haye of "glassing him", before saying at least four times that he would shoot the former WBA heavyweight champion.

He added: "If David don't fight me, I am going to physically burn him."

Smith said the scuffle ranked among of the lowest moments in British boxing history.

"I'm very disappointed and very saddened that in a sport I love I have to deal with this," he said.

"I have to speak to the German Boxing Federation and German police and then take appropriate action. This is not good, it's bad, we have to deal with it accordingly."