Two children have been found in a car believed to be stolen following a police chase.
The youngsters were in the back of the Toyota when it failed to stop on the M25 between Leatherhead and Wisley.
Members of the public reported that a number of people got out of the car and then ran from the vehicle, possibly across the A3.
One person is believed to have run to a nearby slip road and stolen a Toyota vehicle, which was stopped at the time following a brief confrontation with the driver.
Surrey Police are appealing for witnesses "as a matter of urgency".
This was clearly a concerning incident where the dangerous driving and subsequent actions of the vehicle occupants put the lives of other road users at risk. Fortunately no-one was injured during the incident, but given that this took place in such a busy area where two major roads meet I feel certain that many people must have seen what happened and I need them to come forward as a matter of urgency. I can assure Surrey residents that we are doing everything we can to trace the individuals involved. >The ongoing investigation is at a very early stage which is why it is so important that we hear from anyone who saw what happened or with any footage of the events unfolding so that we can clarify the circumstances surrounding the incidents. >
Anyone with information about the incident can call Surrey Police on 101 or Crimestoppers anonymously on 0800 555 111.