RedactedNarrative: The watercraft was fueling at the River Grove Marina fuel pier. Once they had fueled, the operator started the engine and shortly afterward, an explosion occurred within the hull of the boat. It broke the glass out of the windows. A fire started on the boat which the occupants unsuccessfully attempted to fight with a fire extinguisher. 
  
  Everyone was able to exit the boat without injury and due to the intensity of the fire, they disconnected the boat from the fuel pier. The boat drifted down river to the Rock Island Swing Bridge where the current held it against one of the bridge supports for a few moments before it again drifted downriver. The fire department and a tugboat sprayed water on the boat until the fire was extinguished and the boat sank at approximate coordinates of N 44 49.886 by W 093 00.541, approximately 1.5 miles down river from the fuel pier. The boat was a total loss.