The driver of the taxi has been arrested and mobile phone video from the scene showed a man being held face down by the law enforcement.
The incident does not appear to be terror related as it’s reported that Met Police has described it as a traffic accident. The Police said they are investigating any possible motive, and that a man has been detained but not formally arrested.
There’s been a serious incident outside the Museum. We are working w/ @metpoliceuk and will provide an update when we have more information
— NaturalHistoryMuseum (@NHM_London) October 7, 2017
Downing Street confirmed that the Prime Minister Theresa May was being briefed on the incident.