Christopher "Kid" Reid -- one half of the rap group Kid n' Play -- was arrested in Los Angeles earlier today ... TMZ has learned.
Law enforcement sources tell us the 47-year-old rapper is currently in custody.
We're told LAPD officers went to Reid's home to take him into custody because there was an active warrant out for his arrest. So far, it's unclear why the warrant was issued in the first place.
Sources tell us Kid was "very cooperative" with the cops.