In a statement, police said a further five people arrived at hospitals in the area to get treatment for gunshot injuries they received during the shooting at the club.
Police say none of the victims' wounds are life-threatening.
Riverside Police said they have launched an attempted murder investigation.

The investigation is being handled by the department's robbery-homicide and gang intelligence units.

A police spokesman said the investigation is ongoing and no other details are available.

The First Purge is the fourth installment of The Purge franchise and shows the origins of the first annual 'Purge' - a 12-hour window once a year in which all crime in America is legal.
Anyone with information about this incident is urged to contact Detective Trevor Childers at (951) 353-7130 or Detective Karla Corbett at (951) 353-7134.

They can also submit information anonymously by emailing rpdtips@riversideca.gov or utilize the Riverside Police Department's mobile app 'Submit a Tip' feature referencing incident number P18204848.

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