RedactedNarrative: Vessel one AL 1123 RB (25 ft Sea Fox with two 150 HP Yamaha motors/remote steering) was tied to a dock on Calcasieu River (West Fork).  Three (3) individuals were working on vessel one.  Subject1 was working on the percolator switch when two (2) wires touched and caused an electric spark.  When the electric spark occurred, vessel one exploded causing a large fireball.  The port/stern side of vessel one had damage on the gunwale.  The compartment door on the center console blew out.  The hatch on the port/stern side inside vessel one blew out.  
  
  The three were sent to Lord's Hospital in Lafayette for treatment on first, second and third degree burns.   Subject1 did verbally state to agents that he did smell some gas fumes while working on the perculator switch on vessel one.  Vessel one was filled up with gas the day before the incident (07/28/2018).  It is undetermined where exactly the leak was coming from in vessel one.  The main contributing factor is ignition of fuel vapor and the secondary contributing factor to this incident is the passenger behavior of working on the percolator switch that caused a spark that ignited the vapor.
  