A man has been arrested after a car crashed into the front gates in Down street.
Video broadcast by the BBC shows the car driving towards the gates at a relatively slow speed and then braking almost to a stop, before continuing to drive towards the gates.
Despite the low-speed crash, bystanders can still be seen quickly fleeing the area. Police said there are no reports of injuries and investigations are ongoing.
Shortly after the incident, a video posted online showed a convoy of cars exiting the back of Number 10, after the car crashed into the gates.
Rishi Sunak is believed to have been working from Downing Street this afternoon.
One person has been arrested after a car crashed into the front gates on Downing Street (pictured)
Police added that there are no reports of injuries and investigations are ongoing.
Police have cordoned off a large area of Whitehall after the car rammed the Downing Street gates.
Large sections of Whitehall were closed to the public and vehicles after the incident, with pedestrians moving away from the main thoroughfare around Downing Street in central London.
There is a significant police presence in the area and cordons have been established blocking access to the street from outside the Ministry of Defence.
City of Westminster Police tweeted: “At around 4.20pm a car collided with the Downing Street gates in Whitehall.
“Armed officers arrested a man at the scene on suspicion of criminal mischief and dangerous driving.”
The incident occurs when many civil servants leave their offices for the day in the area.
Witness Simon Parry, 44, said: “I heard an explosion, looked up and saw a bunch of policemen with tasers yelling at the man.
“Many police vehicles arrived very quickly and were very quick to evacuate the area.”
This is a breaking story, more to follow.