Sgt. George DeMarois says several witnesses identified West as being involved in an altercation around 12:15 p.m. on Monday at an office on exclusive Wilshire Boulevard. The rapper had left the premises by the time officers arrived.
Police said Tuesday they weren't releasing further details and Blair Berk, an attorney representing West in another case, declined comment.
West was charged last year with misdemeanor battery and attempted grand theft after a fight with a photographer at Los Angeles International Airport. He's pleaded not guilty in the case.
The photographer has sued West for assault and battery. West's attorneys stated that West was in fear for his safety.