Saskatoon Police are investigating a collision that occurred at 12:06 pm June 24, 2007. The pedestrian was struck by a City of Saskatoon bus that was turning from the Bus Mall to go North on 3rd Ave. The pedestrian was in the North East quadrant of the intersection.. The 73 year old male pedestrian was taken to Hospital by M.D. Ambulance with injuries that are believed to be serious. Saskatoon Police accident re constructionist's are on scene investigating.