OKLAHOMA CITY (AP) — A boiler that was being brought back online after maintenance exploded at an oil refinery in Wynnewood, killing one worker and injuring another, Garvin County’s sheriff said Saturday.

Billy Smith, 34, of Pauls Valley, died in the blast at the refinery on Friday evening and Russell Mann of Davis was hospitalized with undisclosed injuries, Sheriff Larry Rhodes said. Both were employees of the CVR Energy Inc.-owned plant, Rhodes said.

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