The blast damaged a chocolate plant in West Reading, Pennsylvania, killing at least 2 people. This video has been updated to correct the number of people killed.

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An explosion at a chocolate factory in Pennsylvania Friday evening killed two people and left several others missing as investigators begin to determine a cause.

West Reading Borough Police Department Chief of Police Wayne Holben confirmed there were two fatalities, nine people missing and several others injured by the explosion at the R.M. Palmer Co. plant in West Reading.

The explosion at 4:57 p.m. sent a plume of black smoke into the air and resulted in the destruction of a building at the facility and damage to a neighboring building. The cause of the explosion remains under investigation, Holden said during a press conference.

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