The driver, a 42-year-old female ambulance technician, and the patient, an 88-year-old man, were pronounced dead at the scene.
A male crew member and a male relative of the patient remain in hospital both in a serious condition.
More top news
A serious case review into the exploitation of young people in Oxford has documented a catalogue of failures by police and social services.
Oxfordshire Safeguarding Children's Board has apologised over the time it took to investigate child exploitation in the county.
Tuesday's weather for the west of the region