Dubuque County officials report two dead in a single boat accident on the Mississippi River. According to the report, members of the Dubuque County Sheriff’s Office, Iowa DNR, Dubuque County Conservation, Key West EMS and East Dubuque, IL EMS responded on Saturday to Massey Marina for a single boat accident on the Mississippi. Two male occupants of the boat were recovered from the river and were pronounced deceased on scene. The incident is under investigation by the Iowa DNR. The names of the victims will be released this morning pending notifications to family.