LONDON — The London police arrested a man on Saturday after his car jumped the curb and crashed into several pedestrians near the Natural History Museum, injuring at least 11 people, the authorities said.

The crash, which the police said appeared to be a “road traffic collision” and not terrorism, occurred on Exhibition Road in the South Kensington neighborhood.

Photographs on social media showed officers pinning a man to the ground and blood on the pavement.