"“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.
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Emma Jesson brings you Sunday night's forecast
Wet and windy spells, interspersed with drier interludes this week. Breezy with wintry showers, variable temperatures and a weather warning
Mostly cloudy, some bright spells, rain on and off and blustery. Milder temperatures than on Saturday