GREENSBURG, Pa. (WHTM) – Police are looking into what caused a natural gas pipeline to burst Friday morning.
The blast in Salem Township, Westmoreland County damaged at least four homes and injured one person.
Spectra Energy said the Pipeline and Hazardous Materials Safety Administration is investigating.
Two pipelines parallel to the site were being drained of natural gas on Saturday. Officials said that should be completed by the end of the day.
The company said the state environmental protection department is monitoring the air. They will also test surface water in the area. A silt fence along a nearby stream will be installed to protect the water.
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The Associated Press contributed to this article.