Matthew Fox was held by police on Saturday after clashing with a woman outside a bar, according to a report.
The Lost star had attempted to board a party bus in Cleveland, Ohio but was confronted by the female driver as he was not on the guest list.
A tussle ensued, and an off-duty police officer at the scene handcuffed Fox, according to TMZ.com. The actor was later quizzed by police and released, but was not formally arrested.
Cops in Cleveland are still investigating the incident.