At least 11 people were injured on Saturday after a car ploughed into pedestrians outside London's Natural History Museum, London Metropolitan Police said, adding that it was not an act of terrorism.
One person was arrested after the road traffic collision outside the museum, Xinhua news agency quoted the police as saying.
"The incident is a road traffic investigation and not a terrorist-related incident," the statement added.
The police said they were called at 14:21 p.m. local time to reports of a collision in Exhibition Road, South Kensington.
Pictures and video shared on social media showed street damage and a large police presence in the capital's museum district, which is home to the Natural History Museum, the Science Museum and the Victoria and Albert Museum.
Nearby museums were evacuated while the roads remain closed.
The Natural History Museum tweeted: "There's been a serious incident outside the Museum. We are working w/ @metpoliceuk and will provide an update when we have more information."
One video online showed a man being restrained on the ground in the middle of Exhibition Road. None of the four people around him were in police uniform. A black Toyota car is seen behind them with the driver's door open.
Police have described the incident in the South Kensington area of London as a collision and said the motive for the incident was under investigation.
"Officers are on scene, and the London Ambulance Service have been called. A man has been detained at the scene. Enquiries to establish the circumstances and motive are underway," police said.