Singer Chris Brown was "cooperative" when Los Angeles County sheriff's deputies arrested him Friday.
The singer was arrested on a warrant issued for a probation violation related to his 2009 conviction in the assault on his then-girlfriend Rihanna, sheriff's officials said.
He was booked into jail in downtown Los Angeles and was being held without bail.
Deputies arrested him when he arrived at a rehabilitation facility in Malibu, sources told the Los Angeles Times.
Two sheriff's officials who had been briefed on the arrest told The Times that a judge asked the rehab facility to notify authorities if Brown showed up.
The facility called authorities Friday when Brown arrived. After confirming the warrant with the state Probation Department, deputies arrested the singer.
Several sources said they did not know how Brown may have violated the terms of his probation.
Probation Deputy Chief Reaver Bingham confirmed that his department submitted a report with the court about an alleged violation, but he declined to provide details.
He said the "court has to evaluate and consider" the report.
Brown's attorney, Mark Geragos, said Friday afternoon he didn't have an immediate comment on the arrest.
In November the singer was ordered to submit to a 90-day live-in anger-management treatment program, where he would have to complete three eight-hour days of community service each week and undergo periodic drug tests.
Prosecutors in February asked a judge to take Brown into custody for failing to live up to a probation requirement that he "obey all laws."
He was arrested in October in
But Los Angeles Superior Court Judge James R. Brandlin said he would not jail the singer because he had showed progress in rehab.