Officers from Hampshire Constabulary Roads Policing Unit have closed Goldsmith Avenue, Portsmouth after a pedestrian has suffered life-changing injuries in a collision.
Paramedics from South Central Ambulance Service were called shortly after 10.00 am after a vehicle hit a pedestrian close to the pedestrian crossing of Fratton Way.
Specialist medics from Hampshire and Isle of Wight Air Ambulance were also in attendance to administer life-saving treatment.
The casualty was stabilized at the scene has been airlifted to Southampton Trauma centre for life-saving treatment.
Hampshire Police have been approached for comment