Local digest: Fire guts Metrobus; boy's death ruled accidental; woman hurt in hit-and-run Fire guts Metrobus; cause is unknown Investigators are trying to figure out what caused a fire that gutted an off-duty Metrobus along New York Avenue early Monday. The incident occurred about 1:30 a.m., along New York Avenue NE between Bladensburg Road and South Dakota Avenue, just outside of Metro's Bladensburg bus division. The fire on the empty bus caused officials to briefly close inbound lanes of New York Avenue in the overnight hours. The road was opened before dawn, and there were no traffic delays. Metro spokesman Dan Stessel said the fire started in the "engine compartment of the bus." There were no reports of injuries. Boy's death in car is ruled accidental The death of a 7-year-old boy with autism, who was found dead inside a car in Northeast Washington in July, was ruled accidental by the District's medical examiner, police officials said Monday. Police located Michael Kingsbury inside a locked Nissan Ulitma on July 8 near his home, in the 1700 block of West Virginia Avenue, about 32 hours after he was reported missing. The Office of the Chief Medical Examiner performed an autopsy the week of his death, but the final report was announced Monday which ruled his death accidental, said Officer Paul Metcalf, a D.C. police spokesman. Officials from the medical examiner's office could not be reached immediately for details. His family and D.C. police frantically searched for the boy in his neighborhood during the sweltering days of early July, but ended up finding him just 40 feet from his own doorstep. It was not clear why searchers did not find him after looking into the car multiple times. Woman badly hurt in hit-and-run A 21-year-old pedestrian suffered life-threatening injuries after she was struck by a vehicle that fled the scene in Springfield on Sunday night, Fairfax County police said. The woman was walking along the southbound side of Gambrill Road near Vogels Way shortly after 7:30 p.m. when she was hit from behind by an unidentified vehicle, police said. The driver did not stop to render aid. The victim was later taken to Inova Fairfax Hospital. Police are asking for the public's assistance in locating the vehicle that struck the woman. Anyone with information is asked to call Crime Solvers at 1-866-411-8477.