Federal safety investigators issued a subpoena to Pennsylvania’s public utility regulator on Monday for documents related to a fatal explosion at a chocolate factory, escalating a months-long legal dispute over the state agency's authority to share the sensitive information.
The National Transportation Safety Board said the Pennsylvania Public Utility Commission has refused to provide unredacted inspection and investigation reports for UGI Utilities Inc., the natural gas utility at the center of the probe into the March 24 blast at the R.M. Palmer Co. plant in West Reading.
