Four killed in Halloween shooting in California

At least four people were killed and several wounded in a shooting at a Halloween party near San Francisco, local authorities and media reported.

The shooting took place at a rented Airbnb home around Thursday night in Orinda, around 30 kmsnortheast of San Francisco, according to NBC Bay Area news.

"Orinda homicide update - four fatalities, several injuries," the Contra Costa County sheriff's office tweeted early Friday.

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Three people were killed and nine others wounded in a Halloween party south of Los Angeles late Tuesday, local media reported.