A 71-year-old woman was taken to hospital on Tuesday with a serious head injury after a collision with a car in Wimborne.
The incident took place in Stone Lane near the junction with Knob Crook Road in Wimborne around 4.42pm.
A police spokesperson said the woman was "struck" by a Mitsubishi Warrior driven by a local man.
She suffered a serious head injury and was taken to Poole General Hospital where her condition last night was described as "serious but stable."
No-one was arrested.
Police are asking anyone with any information to contact them on 01202 222222.
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