Toronto police are investigating a three-vehicle collision in Scarborough that sent at least one person to a hospital on Friday afternoon.Emergency crews were called to the area of Birchmount Road and McNicoll Avenue just before 12:30 p.m.Paramedics say three people were transported to a hospital; one person with serious injuries was taken to a trauma centre in stable condition, and two other people were treated for minor injuries.Police say all three drivers remained at the scene. An investigation is ongoing.