Los Angeles police formed a skirmish line late Wednesday as they tried to disperse crowds that had gathered outside a club in Lincoln Heights.
The incident was at Avenue 24 and Broadway outside the Airliner club, according to police and television news footage.
"The bouncers started turning people away and it got unruly," Officer Norma Eisenman told The Times.
Police at the scene were requesting additional officers from the Central Bureau to deal with the crowds.
Los Angeles Police Department cruisers were driving north along Broadway with lights and sirens as officers took up positions along the street.
It was not immediately clear whether any arrests were made or whether there were any injuries.