A Kensington man was killed Friday morning when he apparently tried to board a SEPTA bus through the rear door and was dragged under the vehicle in North Philadelphia, police said. William Bogl, 62, was pronounced dead on arrival at Hahnemann University Hospital. Police said he apparently tried to board the eastbound Route 15 bus on Girard Avenue at North Eighth Street about 9:25 a.m., but the door closed and his arm got caught. The bus then started to move, and he was dragged under the vehicle and run over, police said. SEPTA said a bus was operating instead of the Route 15 trolley because of work in the area.