The gunfire was reported at the Muckleshoot Casino Saturday night. Responding officers found a suspect driving nearby and arrested the person for investigation of first-degree assault.
Auburn Police Cmdr. Jamie Sidell says it's not clear what led to the shooting.
The identities of the victims and the suspect were being withheld. Sidell says police don't know when the victims will be well enough to speak with detectives.
The suspect had a last known address in Renton.
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