Surrey Police said the police presence in Cottage Grove was connected to a search for a missing person. But a witness said they saw a person put into a police van in Cottage Grove at about 10.30pm after it pulled up with a number of cars.
Police officers continue their efforts to locate Tolworth pensioner John Harding, who has now been missing from his home for two weeks.
Officers are asking people in the Tolworth area to check garages and outbuildings. They remain extremely concerned for his welfare and reiterate previous appeals for information from the public which may assist in locating him.
John was last seen on Saturday 26 April, at 19:00hrs when he left his home address in Woodland Way, telling his wife he was going for a walk.