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2nd victim dies after blast at Louisiana chemical plant

June 13, 2013: This photo provided by Ryan Meador shows an explosion at The Williams Companies Inc. plant in the Ascension Parish town of Geismar La.

June 13, 2013: This photo provided by Ryan Meador shows an explosion at The Williams Companies Inc. plant in the Ascension Parish town of Geismar La.  (AP2013)

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.