A night out for a good time with some good music last night (Mar 2) in Tempe,Az as a scheduled performance by Nipsey Hussle at the Clubhouse Music Venue ended with a shooting incident outside that left 13 people wounded,, 2 seriously.

Witnesses describe the scene as "chaotic."

"People stampeded over security. Not what I expected to be doing on a Friday night -- dodging bullets," said Paul Butler, who witnessed the shooting.

Butler and other witnesses say a large crowd was waiting outside the club for the doors to open when gunfire broke out.

Nipsey took to Twitter after the incident:

Neither witnesses nor police are sure of a motive.

Police are not sure what prompted the shooting, but they are searching for two young black men seen fleeing the club on foot. Source