A four year old boy is being treated at Frenchay Hospital near Bristol for serious head injuries after a crash on the A3072 near Holsworthy.
He and a 32 year old woman were in a car, which overturned on the road. She sustained back injuries.
Police would like to hear from anyone who saw the accident, which happened between Weekstone Cross and Weekstone Cottage just after 1pm on Saturday afternoon.
More top news
Dementia patients are being failed by health and social care services, say doctors in our region.
Fragrant, beautiful and more and more popular in soft drinks, this year's elderflower crop has been particularly good for our region.
It's not just visitors at Exmoor Zoo who've been tucking into ice lollies and cool drinks in the heat - check out these charming pictures