A controlled explosion has taken place near the site for the new US embassy in London, after police attended a report of two unattended vehicles.
Officers were called at 16.38pm on Wednesday to Ponton Road, in south west London.
A controlled explosion was carried out around an hour later
Specialist officers are at the scene near MI6, and cordons have been put in place.
London Ambulance Service and the London Fire Brigade are also in attendance.