Updated 5.20pm
Several people have been injured after a car reportedly ploughed into people outside London's Natural History Museum.
Scotland Yard said that "a number of pedestrians have been injured" in an incident in Exhibition Road in South Kensington shortly after 2.20pm.
A Metropolitan Police spokesman said: "Officers are on scene, and the London Ambulance Service have been called.
A spokesman later said the incident was not being treated as terrorism-related at this stage. Police originally said a man was arrested at the scene but later clarified he had only been detained.
Pictures and footage from the scene showed street damage and a massive police presence in the capital's museum district, home to the NHM, the Science Museum and the Victoria and Albert Museum.
A BBC reporter at the scene said she could see a car diagonally across the road surrounded by a crowd of people with one or two on the ground. She said she was told by police injuries sustained were minor.
The area is a magnet for tourists, including lots of children.
Afra Wang posted a picture of emergency services on Twitter, writing: "A crime scene? Full armed police locked the whole area out outside of...
