Police in Munich have confirmed that they are looking for David Haye after detaining Dereck Chisora at the Bavarian capital's airport.
They want to speak to the pair about a brawl at the post-fight press conference following Chisora's defeat to Vitali Klitschko last night.
A Munich Criminal Police spokesman said: "Police picked up Mr Chisora at the airport at approximately 10.30am (German time) and are bringing him in for the investigation.
"They also picked up Mr Chisora's trainer for questioning. The police went to the hotel to speak to them but we had been informed they had just checked out."
The spokesperson however added that former WBA champion Haye was not at his hotel: "At present we do not know where Mr Haye is.
"We are currently looking for him. He was not at the hotel this morning and we have not seen him at the airport."
Watch a full video of the skirmish here.