GONZALES, La. (AP) — Authorities say a second victim has died after an explosion and fire at a south Louisiana chemical plant.

Louisiana State Police Capt. Doug Cain says 47-year-old Scott Thrower died Friday at a hospital, a day after the blast at the plant.

Another worker, 29-year-old Zachary Green, died in Thursday's explosion at the Geismar plant owned by Williams Companies Inc.

Williams officials and a spokesman for the Labor Department's Occupational Safety and Health Administration say the cause of the blast is not immediately known.

Alan Armstrong, the company's president and CEO, says it's unclear when operations will resume.

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