The Nevada Highway Patrol is warning drivers about reports that someone in an unmarked pickup tried to pull someone over in the area of southbound 580 at the Mt Rose Highway. It happened about 10:30 Wednesday morning. The vehicle attempting to stop the reporting party, was a silver or gray colored Ford F-150 extended cab pickup with Nevada plate 89A639. This Ford pickup had no markings on it that would identify it as a law enforcement vehicle. But was equipped with red and blue flashing lights. The reporting party did not stop for the pickup, but stayed on the phone with DPS dispatch as it continued southbound on IR580. Residents are urged to call 911 if any unmarked pickup matching the description attempts to conduct a traffic stop on them.