Officers and the police helicopter were called to Tolworth Rise South yesterday just before midday.
The woman was taken to hospital and her condition is not thought to be life threatening.
There have been no arrests and enquiries into the circumstances continue.
Anyone with information that could assist police is asked to call 101 or ‘X’ @MetCC and quote CAD2673/7Jan. You can also provide information anonymously to the independent charity Crimestoppers on 0800 555 111.
