Tyson Fury has been notified that he has failed a test for cocaine, according to a report from ESPN.
The U.S. outlet says that "multiple sources with knowledge of the test results" have confirmed the information to them. The test came from a urine sample collected on September 22, the day before Fury's rematch with Wladimir Klitschko was cancelled for medical reasons.
ESPN added that the results "are not yet complete, but the positive cocaine test likely will result in Fury being stripped of his world title belts."
Fury has already been charged with a separate offence by the UK Anti-Doping Agency. He and his camp are yet to comment on the matter, though his uncle and trainer Peter Fury recently stated that Tyson had been the victim of a media "witch hunt".
Earlier this week, promoter Eddie Hearn stated his belief that Fury would not step into the ring again. The Manchester-born fighter has been involved in several controversies since winning the heavyweight titles from Klitschko in November 2016, with multiple comments of a racist, sexist and anti-Semitic nature attracting negative attention.
With Fury seemingly no longer in the picture, rumours of a fight between Klitschko and Hearn's fighter Anthony Joshua have escalated. "We are in talks with Team Klitschko and his manager Bernd Boente," said Hearn. "I'm hopeful that the fight can be made if everything works out."