Krayzie Bone -- Bone Thugs Rapper Arrested for DUI

Bone Thugs-n-Harmony rapper Krayzie Bone was arrested for drunk driving in L.A early this morning ... TMZ has learned.

Law enforcement sources tell TMZ ... the 39-year-old was pulled over around 12:30 AM on a routine traffic stop ... when officers suspected Krayzie was boozed up.

We're told the rapper was asked to perform field sobriety tests ... and didn't do too well. In fact, we're told he blew over .10 on the breathalyzer ... well above the legal limit in California, .08.

Cops arrested Krayzie on suspicion of DUI ... and he was booked at a nearby jail. We're told he was cooperative during the bust.