A gunman is dead after killing a man and critically wounding two women near polling stations in the Californian city of Azusa.

Shortly before 2.45pm (local time), officers were called to a residential area after reports of shots fired near several schools, including one that was serving as a polling place, and across the street from a park that also had a polling site.

The two polling booths were shut down for several hours while officers surrounded a home where the suspect barricaded themselves inside.

It's unclear whether police fatally wounded the gunman.

The shooting happened near an LA-area polling station.

No officers were hurt.

Authorities have said the attack was not election related, but are yet to determine a specific motive for the shooting.

The names of the gunman and the male victim have not been released.

Emergency services at the scene.