The four workers, employed by energy company J. Fletcher Creamer & Son Inc. were taken to a nearby hospital, the township said, calling the explosion "serious." The Occupational Safety and Health Administration (OSHA) said it is investigating.
Exit 9 on Route 287 was initially closed in both directions in Piscataway while first responders tended to the incident, but it has since reopened, according to traffic alerts from 511nj.
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