Cambria County, PA, authorities are searching for those responsible for tampering with the county's radio frequencies used by 911, EMS, police, and Cambria County Prison, reports the Tribune-Democrat .
"Unauthorized individuals have used Cambria County radio frequency to transmit false information to authorities while posing as police officers and corrections officers," District Attorney Kelly Callihan said in a statement. "These actions are criminal and potentially place the safety of our first responders and the public in jeopardy."