Authorities are investigating a deadly rollover crash involving a Palm Beach County Fire Rescue truck and another vehicle. Traffic investigators responded to the scene around 9:30 a.m. near Tuscany Bay Blvd. and Military Trail in suburban Delray Beach. Video from Chopper 5 showed the rescue unit on its side and heavy damage to the other vehicle. A Fire Rescue spokesperson said two firefighters and two civilians were taken to the hospital. The Palm Beach County Sheriff's Office confirmed at least one person is dead, and that person was in the other vehicle. Military Trail was shut down for several hours Monday morning during the investigation, but it eventually reopened around 1 p.m.