STOCKTON, Calif. (AP) — Authorities in California appealed to the public for tips, cellphone video, witness accounts and even rumors as they searched Sunday for a suspect in the killing of three children and an adult during a mass shooting at a child's birthday party.

Someone opened fire at a banquet hall in Stockton where 100 people or more had gathered on Saturday, San Joaquin County Sheriff Patrick Withrow told reporters. He said detectives believe the gunfire continued outside and there may have been multiple shooters.

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