Dereck Chisora has been arrested by Munich Police and is being questioned following last night's press conference brawl with David Haye.
The British heavyweights clashed violently in the aftermath of Chisora's points defeat to WBC champion Vitali Klitschko in Munich, in scenes Chisora's promoter Frank Warren called "ugly, horrible and disgraceful".
A Munich Criminal Police spokesman said that Chisora had been arrested as he and his trainer, Don Charles, were taken from the city's airport to Police headquarters after an investigation was opened into the brawl.
The spokesman confirmed also that Police were still searching for Haye, who was not present at his hotel when they sought to question him this morning.
Warren was unhappy that the incident took place and, while clearly critical of Chisora's conduct, pointed the finger at former world champion Haye, who had been commentating on the bout, for being present at the media conference.
"It was an embarrassment for British boxing," he told Sky Sports News.
"It's brought the sport into a bad light, which is a great shame for all the fighters that do behave, and 99% of them do behave and carry a lot of honour into the sport.
"I would say they were total idiots.
""(But Chisora) didn't throw the first punch, it's as simple as that. He got hit in the lip with a glass or a bottle, he said.
"I'm sure the police will get to the bottom of it in Germany. I'm quite sure he'll be released some time today.
"Not that I'm condoning or trying to stick up for him, what happened was outrageous and it was wrong, but he certainly did not throw the first punch.
"Let's get it right: the press conference afterwards was for the participants and for everyone involved in promoting on Saturday night.
"It wasn't a David Haye promotion. It was David Haye who came in.
"It was David Haye who started shouting off and calling people out. It was certainly not Dereck Chisora who did that.
"Dereck Chisora as much as the stupid things that happened before the fight, should have at least be able to have his moment which would have been deserved recognition of what he did in the ring."
Chisora clashed with Haye during the press conference and the two men grappled around the room with their entourages getting involved. Chisora was seemingly heard making threats and claiming to have been "glassed".
Haye is then captured on Press Association video footage trading punches with Charles before swinging a large camera tripod over his head at Charles.
Haye's manager Adam Booth somehow suffered a nasty cut on his forehead and also claimed to have been "glassed".
Moments later Chisora re-appeared brandishing a glass bottle but was wrestled under control.
Prior to the altercation, the fighters had traded insults, with the former mocking Haye's performance in defeat to Wladimir Klitschko last year and Haye responding by pouring scorn on Chisora's record.
Warren was full of praise for his charge's gusty in-ring display against the champion but could not hide his disappointment at what followed and even went as far as questioning whether he could continue as a professional after yesterday's events.
"It was a ridiculous thing that he did and it took away all that he did in the ring. he fought really well. He was a huge under-dog and he fought his heart out," continued Warren.
"It's ridiculous that a guy when he gets in the ring can do so well but he gets himself involved in some horrible situations (out of it)."
"We said a lot last night. We need to let this sink in, (see) what position he's in and why he's in the position and then we'll deal with it as best we can.
"Then we'll decide his future, if he's got a future, in boxing."
A spokesman for the Munich Police told Press Association Sport: "Mr Chisora was arrested after Police went to the airport where he was at approximately 10.30 (German time) this morning.
"Mr Chisora is now being questioned by Police at their headquarters in Munich in relation to the investigation. At present we do not know where Mr Haye is," he added.
"We are currently looking for him. He was not at the hotel this morning and we have not seen him at the airport."
British Boxing Board of Control general secretary Robert Smith indicated the governing body would launch an investigation.
"It was extremely disappointing and disgusting really," he said.
"There will be hearing. I've seen the footage this morning and it doesn't do the sport any good, or Britain. It was like 'Brits abroad'.
"The first thing we need to do is find out the facts.
"I will be contacting the German boxing authorities and now the police to get the facts tomorrow."
Smith confirmed Haye did not have a BBBC issued license, meaning the governing body is unlikely to be able to sanction him.
Smith said Haye's hopes of renewing his license, however, had "not been helped" by last night's incident.
When contacted, Booth, who was working as radio summariser and who has trained Haye throughout his career, declined to comment on the incident.