"“This is a tragic incident which happened at a very busy time in Darlington on Saturday tea time.
"We are appealing to members of the public to help us establish the events leading up to and immediately following the collision.”
Anyone with information is asked to contact Durham Police on 101, stating reference number DHM-21122013-0391.
More top news
The Met Office have issued a yellow "Be Aware" warning of strong winds for the region for Sunday into Monday
Emma Jesson brings you Saturday night's forecast
Christmas Eve could be rather frosty and at present, Christmas Day looks like being cold and clear with one or two wintry showers