RedactedNarrative: 36 foot vessel caught fire at dock behind a residence. In Hillsborough county Florida between 0630 and 0642 hours. Vessel became fully involved by the time Hillsborough County fire arrived to extinguish the vessel. Fire Investigators with Hillsborough County concluded the cause of the fire was indeterminable. No body was on the vessel at the time of the fire. There were no injuries. There was no evidence of collision with another vessel, and no available evidence of illicit activity.