Twenty people are being treated in hospital after a minibus overturned in rural Cambridgeshire.
The two-vehicle collision happened on the B1040 Somersham Road near the villages of Woodhurst and Bluntisham, at 16:51 GMT.
"Multiple people are involved and some are seriously injured," police said.
More than 20 firefighters are at the scene, the fire service said. A police cordon is also in place.
Casualties are being taken to Addenbrooke's and Hinchingbrooke hospitals in Cambridge and Huntingdon, a spokeswoman for the East of England Ambulance Service said.
A spokesman from Cambridgeshire Constabulary said they had "varying levels of injury".
Roads in both directions near Wheatsheaf Road are closed and diversions are in place through Pidley.
The East Anglian Air Ambulance and a hazard response team are also at the scene.