A car has been involved in a collision near the Natural History Museum in London, police say.
The Metropolitan Police said a “number” of people had been injured – but a BBC reporter at the scene said she was told by police the injuries were minor.
One person has been arrested following the incident in Exhibition Road in South Kensington.
Police said inquiries are under way to establish the circumstances and any motive.
BBC reporter Chloe Hayward was leaving the Natural History Museum as the incident happened.
“I could see was a car diagonally across the road, looking like it was going into one of the boulders on the side of the road, and I could see a crowd of people around what was clearly one or two people on the pavement,” she said.
She added there were now armed police at the scene.
“We have had lots of police coming onto the scene, helicopters above, and I can see an ambulance which is definitely having someone put in, but it isn’t clear how bad that injury is.”