(CNN) -- Singer Chris Brown was arrested Thursday night in Florida, where he was performing as part of a nationwide tour.
Brown, 29, was scheduled to perform at 7 p.m. at the Coral Sky Amphitheatre in West Palm Beach. It's unclear whether he was arrested before or after the concert.
The singer was arrested on an outstanding out-of-county warrant from last year, the Palm Beach County Sheriff's Office said. It declined to provide additional details on what the warrant was for, but said Brown was booked and released after he posted bail.
CNN has reached out to Brown's attorney.
The singer has had several run-ins with the law, including physical assault charges following an incident with his then-girlfriend, Rihanna, in 2009. He was charged with felony assault and making criminal threats in that incident, and received five years' probation and community service.