German Police are ready to seek help from Scotland Yard as they hunt British heavyweight David Haye following his press conference brawl with Dereck Chisora in Munich.
Chisora returned to Britain on Sunday night after being arrested, questioned and released by detectives following the incident, which occurred immediately after his WBC heavyweight title defeat by Vitali Klitschko on Saturday night.
It's understood Haye, however, may already be back in the United Kingdom while German detectives also believe it is likely he is back in Britain.
Munich Police spokesman Gottfried Schlicht admitted: "We still don't know where David Haye is.
"I don't know whether British police have been contacted yet because that is the job of the court, not the Munich Police. "We have to ask the court in Munich and the court goes to Scotland Yard or wherever in the UK.
"That is likely to happen but I don't know how long the process will take. "My opinion is that it should or will happen as soon as possible but I can't say whether that will take days or weeks. I don't know."
Schlicht admits detectives are at an impasse until Haye is located.
"Until we speak to Haye, nothing more can happen," he said. "We need both sides. We've heard Dereck Chisora and now we wait to hear David Haye."
Haye fled after the brawl and police have been unable to track him down so far as they seek his side of the story. Officers searched his hotel within two hours of the brawl but Haye had already gone to ground.
Haye's manager Adam Booth - who sustained a nasty cut which may have been suffered when Haye tried to swing a camera tripod at the head of Chisora's trainer - has declined to answer calls from Press Association Sport.
Booth answered a call while still overseas, refusing to comment, but by Sunday morning was ignoring attempts to contact him. Rumours that he and Haye were already back in the United Kingdom by Sunday morning were fuelled by the fact the dialling tone on Booth's phone had reverted to the British style.