Dr. Dre Searched By Cops in Alleged Racial Road Rage Case

Dr. Dre got cuffed and patted down by Sheriff's deputies outside his Malibu home after an alleged road rage dispute over a guy blocking his driveway ... TMZ has learned.

Sources close to Dre tell us the motorist had pulled off PCH and stopped in front of Dre's crib. We're told Dre asked him to move, and he did ... but cussed at the mogul as he did it. Dre pulled into his driveway, but the other driver kept yelling -- so Dre pulled out his phone to record video.

Our Dre sources claim the guy said, "Here we go again, another black guy with a gun." L.A. County Sheriffs tell us the motorist called 911 to report someone pulled a gun on him.