Jon Jones has been stripped of his world title and suspended indefinitely after being arrested on hit-and-run charges this week.
UFC 187 on May 23 will now be headlined by Anthony 'Rumble' Johnson (who was scheduled to challenge Jones) against Daniel Cormier for the vacant light-heavyweight title.
Jones, regarded as an all-time great in the sport, was arrested on Monday night in Albuquerque on a felony charge of leaving the scene of an accident. He is currently bailed.
In January, cocaine was found in a pre-fight test before Jones defeated Cormier, raising concerns about his well-being.
The 27-year-old tweeted on Wednesday: "Got a lot of soul searching to do. Sorry to everyone I've let down."
A UFC statement read: "UFC announced that it has suspended Jon Jones indefinitely and stripped him of the light heavyweight title as a result of violations of the organization’s Athlete Code of Conduct Policy. Jones was recently arrested in Albuquerque, N.M. on a felony charge of leaving the scene of an accident involving personal injury. As a result of the charge and other violations of the Athlete Code of Conduct Policy, the organization believes it is best to allow Jones time to focus on his pending legal matters.
"UFC feels strongly that its athletes must uphold certain standards both in and out of the Octagon. While there is disappointment in the recent charges, the organization remains supportive of Jones as he works through the legal process."