An unhoused man who lived under a bridge in southwest Atlanta died Saturday night after accidentally lighting himself on fire amid freezing temperatures, officials said. At the scene, located near Hapeville and Hartsfield-Jackson Atlanta International Airport, emergency personnel pronounced the man dead. Atlanta police told Channel 2 Action News that the man lived underneath a bridge in the area and was trying to light a fire but accidentally set himself ablaze. A joint death investigation is being conducted by Atlanta Police Department and Atlanta fire. “All circumstances involving last night’s fire death are under investigation,” Richardson said.