Authorities are still trying to put a stop to hateful messages that have been broadcast over Pittsburgh emergency radios for the last three days. Reports say an unidentified man was cursing and using racist language on a local EMS frequency for about 30 seconds yesterday morning. On Monday, pro-Nazi messages were allegedly sent along with a death threat against “the Pittsburgh mayor.” Allegheny County and Pittsburgh public safety officials have said their equipment is not being used by whoever is behind this. County officials have asked the Federal Communications Commission to help investigate.