(Sullivan) One person was killed a house explosion in Jefferson County Tuesday. Dispatch received report of the explosion just before 2pm in the Town of Sullivan on Water Street. The blast damaged nearby homes and some roads in the surrounding area. It took roughly two hours for crews to extinguish a fire that was still active when first responders arrived on scene. Authorities say the incident is still under investigation by state fire marshals but indicators suggest it may have been a gas explosion.