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(CNN) -- A leak at a western Pennsylvania chemical plant Saturday formed a toxic cloud that affected more than 2,000 residents, authorities said.
Hundreds of residents were forced to flee Saturday after a chemical leak in Petrolia, Pennsylvania.
Hundreds of residents were forced to flee Saturday after a chemical leak in Petrolia, Pennsylvania.
Authorities located the source of the leak at the Indspec Chemical Corp. plant in Petrolia and shut it down. Freda Tarbell, spokeswoman for the Pennsylvania Department of Environmental Protection, said it may not be until mid-morning Sunday before officials allow residents to return home.