Two other cars were involved in the incident apart from ambulance.
Police will not give further details at this stage and will not identify the people involved for at least 24 hours.
More top news
Jeremy Corbyn faces full rebellion over decision to not step down as leader.
Come October David Cameron will no longer be Prime Minister, but who could replace him as leader of the Conservatives and how is it decided?
"People must be aware at all times that there are wild animals around them and they must make sure that their tents are properly closed."