UNION CITY, Calif. (AP) — An explosion at a pipe-making factory Wednesday injured at least 12 people, authorities said.
No chemicals were involved in the explosion at the U.S. Pipe and Foundry, said Roberto Munoz of the Union City Fire Department.
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It was not immediately clear what caused the explosion, but it happened as workers were pouring a substance into a mold, Munoz said. Police said the plant was not evacuated or closed.