A motorcyclist has died following a collision in northwest London. Emergency crews were called to the area of Sarnia Road and Castlegrove Boulevard at about 8 p.m. Monday after a crash involving a motorcycle and a vehicle. The motorcyclist was taken to hospital with critical injuries but later died, according to London police. Roads in the area were closed while emergency crews investigated but have since reopened. Police said all drivers involved in the collision remained at the scene. Investigators are asking anyone who was in the area between 7:45 p.m. and 8:20 p.m. Monday who may have witnessed the collision, or who has dashcam, residential security or business surveillance footage, to contact police.
