It's being reported by TMZSports.com famous rap mogul Diddy is being held by UCLA campus police.

His son, Justin Combs plays defensive back at UCLA. Per the report, Diddy got into an altercation with one of the UCLA coaches.

"One source says an assistant coach was screaming at Justin on the field during a strength and conditioning session. We're told the coach "was riding Justin, screaming intensely at him." Diddy watched the whole thing from the sideline.

At some point later, we're told Diddy confronted the coach in his office and grabbed him. Diddy was arrested for assault."

http://www.tmz.com/2015/06/22/diddy-arrested-fight-ucla-football-coach-justin/