(CNN)Two counselors at an addiction facility in southeastern Pennsylvania died after overdosing on opioids, according to the Chester County District Attorney.

“If anybody is wondering how bad the opioid epidemic has become, this case is a frightening example,” Chester County District Attorney Tom Hogan said. “The staff members in charge of supervising recovering addicts succumbed to their own addiction and died of opioid overdoses. Opioids are a monster that is slowly consuming our population.” Authorities haven’t released the counselors’ names.

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