The East of England Ambulance service says 2 patients have been seriously injured in the A1 coach crash at Diddington.
It says they were taken to Addenbrooke's Hospital while a further eleven patients were taken to Hinchingbrooke Hospital with minor injuries.
The trust sent five ambulance crews and three rapid response vehicles to the scene.
More top news
A mainly dry day with some sunny spells in the morning, but turning cloudier during the afternoon. Feeling warm. Highs of 27 deg C.
A 54-year-old man has died and another has been taken to hospital after a group of swimmers got caught up in a riptide at a Norfolk beach.
It will be a dry and warm night with some clear spells and light winds. Lows of 15 deg C (59 deg F).