By Sarah Klein

A chain-reaction crash involving multiple vehicles on the Concordia Overpass sent several people to hospital on Friday, October 26, 2012. (FLORENCE REINSON / TWITTER)
A light dusting of snow overnight is believed to have contributed to a multi-vehicle crash on the Concordia Overpass Friday morning.
As many as 20 vehicles were said to be involved in the crash on Lagimodiere Boulevard, which happened shortly before 7 a.m.
Police had advised earlier about icy road conditions during the morning commute.
Both northbound and southbound lanes of Lagimodiere were closed until about 9:30 a.m.
Several people were taken to hospital with non-life threatening injuries.
Updated at 9:36 a.m.