Tanker, van and car crash on A44 near Aberystwyth
A fuel tanker, van and a car have been involved in a serious crash on the A44 near Aberystwyth.
The collision happened at about 14:55 BST between Llangurig and Ponterwyd and the road will be closed for some time, said Dyfed-Powys Police.
The A44 is shut in both directions between the A4159 (Lovesgrove Roundabout, Aberystwyth) and the A570 (Llangurig). Diversions are in place.
The air ambulance took a girl with head injuries to hospital in Cardiff.
In all, two air ambulances and five other ambulances were sent to the scene along with other emergency crews.
The collision happened around 15 miles (24km) from Aberystwyth, near Eisteddfa Gurig, between the villages of Llangurig in Powys and Ponterwyd in Ceredigion.
A Welsh Air Ambulance service statement said its Welshpool-based medics treated a female child at the scene before she was airlifted to Cardiff's University Hospital of Wales.
Mid and West Wales Fire and Rescue Service said they were called at about 15:00 BST and sent two pumps to the scene.
Eluned Thomas, from Eisteddfa Gurig farm, about two miles away, said she rang for the emergency services after a woman alerted her to a "very, very bad accident" just down the road.
"The woman said a fuel tanker was coming up from Llangurig and a car went straight into it," she said.
Ms Thomas told Radio Wales the A44 was a very winding road, adding: "Accidents happen all the time on this road and it's the main road from the Midlands to Aberystwyth."
She said the woman had asked her to call emergency services because there was no mobile phone coverage in the area.
Initial reports said the collision had involved a tanker and a car, but police later confirmed a van was also involved.
The A44 is one of the main roads in mid Wales and links Ceredigion with Powys. The road is closed for 21 miles (34km).
The stretch between Llangurig and Aberystwyth is around 25 miles (40km) long.