At around 1:30pm Sunday evening, Bridgeport Police responded to a vehicle fire and a report of a male on fire at 659 William Street. Police say a man was working on a vehicle at that location and something exploded, causing him to catch fire. The vehicle fire was quickly extinguished. Police say a man in his 50's received approximately 50 to 75% burns to his upper torso. The victim was transported to Bridgeport Hospital Burn Unit in serious condition. A second male party was also transported who assisted with extinguishment of the male party, according to police.