York Regional Police are investigating after two women and two children were struck by an SUV in Richmond Hill on Thursday afternoon. York Regional Police said it happened at the intersection of Major Mackenzie Drive and Newkirk Road at around 3:18 p.m. One woman was taken to a trauma centre with life-threatening injuries, Duty Insp. Rich Gaudet. The other woman and the two children, ages 7 and 1, were also transported to a local hospital, and Gaudet said they’ve been discharged. The driver of the vehicle remained at the scene and is co-operating, Gaudet said. The circumstances surrounding the collision are unclear. Police said the intersection will be closed for the forseeable future.