Police are appealing for witnesses after a 12-year-old boy was killed by a bus in Willesden. Police were called to the scene at just after three o'clock yesterday afternoon to reports that a 206 bus had collided with a pedestrian. The boy died at the scene around 20 minutes later. Police say the driver of the bus stopped at the scene and has been helping police with their inquiries. Detectives say anyone with information should call them on 0208 991 9555.