The stabbing occurred after a man identified as Jimmy James Johnson assaulted Dr. Dre as the record mogul was about to accept a lifetime achievement award.  Johnson reportedly approached Dre's table and it appeared to witnesses he was requesting an autograph but then punched Dre. 

A melee followed with several people throwing punches and chairs. Johnson was being carried away by security when he was attacked by several people, including Young Buck (real name Darnell Brown). 

The police dispersed the melee with pepper spray.  Johnson, who suffered a collapsed lung, was taken to a near by hospital where he is in stable condition. 

Police reviewed footage of the melee which reportedly showed Brown with a knife following the attack on Johnson, according to Santa Monica Police Chief James Butts, who held a news conference on Tuesday and asked that Brown turn himself into police. 

"Mr. Brown is seen lunging over another male and swinging the knife at Mr. Johnson's upper body while Johnson is looking away from him," said Butts.

Butts told reporters that other arrests may follow. 

Brown is a member of the G-Unit, which won an award at the ceremony for best group. They are signed to Dr. Dre's record label. 

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