Matthew Fox got into some trouble in Cleveland, Ohio, on Saturday.
star was detained by police there for allegedly assaulting a female driver of a party bus.
Fox allegedly tried to get on the bus even though he wasn't invited to take a ride, according to TMZ
, and when the woman tried to stop him, he allegedly punched her.
An off-duty officer handcuffed Fox and then police took him into custody. A rep for the Cleveland police department confirms that the actor "was detained, but there was no arrest made."
According to the police report, the woman punched back and gave Fox a bloody lip.
His rep couldn't be reached for comment.
Reporting by CHARLOTTE TRIGGS