A woman is being cut free from her car this afternoon after the vehicle overturned on the Stevenage A602.
Emergency services were alerted at about 2.45pm after a car overturned on Monkswood Way at the roundabout for Broadhall Way.
Firefighters have been using cutting equipment in an attempt to free the woman, who is said to be conscious and breathing.
An East Anglian Air Ambulance was also called but it is not clear if it was required.
Police have closed surrounding roads while the incident is ongoing.
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