TMZ is reporting that this afternoon [Mar 26], Bobby Brown was placed under arrest!

Bobby Brown has just been arrested on suspicion of driving under the influence … TMZ has learned.

Law enforcement sources tell TMZ, Bobby was pulled over in Los Angeles at 12:20 PM PST for allegedly driving while talking on a cell phone.

We’re told 43-year-old Bobby is currently in custody in Van Nuys jail. It’s unclear what substance cops believe Brown had been using before he got behind the wheel. 

Whitney Houston’s ex-husband already has a DUI conviction on his record stemming from an arrest in Georgia in 1996. He eventually pled guilty to DUI and served 8 days in jail.

UPDATE:  Bobby Brown has been bailed out of jail.