India, Dec. 1 -- At least four people, including three children, have been killed in a mass shooting at a family gathering in California, authorities say.

The victims were eight, nine, 14 and 21 years old, a spokesperson for the San Joaquin County Sheriff's Office said on Sunday. Eleven others were injured in the incident at a restaurant in the state's northern city of Stockton.

A suspect is still on the loose and police say they believe the shooting may have been "targeted".

The city's deputy mayor earlier said the shooting had occurred "at a children's birthday party". Police have not confirmed the type of event at which the shooting occurred, beyond it being a family gathering.

At least four people, including three children, have b...