LOS ANGELES, California (CNN) -- Three people were killed and at least seven wounded Saturday in a drive-by shooting at a motorcycle club fundraiser in California, authorities said.
The shooting occurred around 6:45 p.m. (9:45 p.m. ET) at a pizza restaurant in Pico Rivera, located about 15 miles east of Los Angeles, according to authorities.
"We don't know what type of vehicle was involved or how many," said Sgt. Ed Hummel of the Los Angeles County Sheriff's Department.
The event was being held by a group known as the Old School Riders. It is unclear whether the incident was random, Hummel added.
The three people died at the scene. Their names are not being released pending notification of kin.
Pico Rivera is a city about 15 miles east of Los Angeles.
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