Police say a person with an assault rifle killed one person and wounded two others near two Southern California polling sites that were locked down.
Azusa police Chief Steve Hunt says the suspect began firing Tuesday at arriving officers who returned fire before they took cover near a park.
Hunt says a person is down at the front door of a home but couldn't immediately say whether that person was the shooter.
Elections officials say one of the polling sites has reopened. Voters were being urged to seek nearby polling places.
The motive of the shooting was unknown and it was unclear if it had anything to do with the election.
No officers were hurt.