This is the first photo of the man who is believed to have been the attacker in a terrorist incident in Westminster.
The man is shown on a stretcher receiving medical treatment. In the image, weapons that are believed to be knives have been circled in red.
The car reportedly used as part of a terror attack in Westminster was registered in Chelmsford.Read the full story ›
Extra police officers will be placed on Greater Anglia and c2c trains this evening, following a terrorist attack in Westminster.
British Transport Police in Essex tweeted the announcement on their social media page, to offer reassurance to passengers travelling to and from London.
At least one person is known to have died from their injuries in the attack.
The London Ambulance Service has said that it has treated ten patients involved in the terror incident so far, and that multiple hospitals are on alert in the capital.
Bedfordshire and Essex police are reporting a higher than usual number of calls to their control rooms after the terror attack in London.
Bedfordshire police are asking people to follow the Metropolitan Police twitter feed for updates and Essex police have said to only call them in an emergency.
East Midlands Ambulance Trust have offered their thoughts to the 999 staff dealing with the incident.
Awful incidents here at Westminster. Thoughts very much with those hurt. Atmosphere calm within Chamber. https://t.co/4RYZOM6cTO
Thinking of those injured in London today. Grateful to security at Parliament for all they do to keep us safe.
A picture taken at the scene of a suspected terror incident near Parliament shows the moment an assailant is contained by armed police officers.
The suspected attacker crashed his car into pedestrians on Westminster Bridge before stabbing a police officer at the Houses of Parliament.
Eyewitness Frances, who was in the area when the incident happened, told ITV News reporter Emma Murphy that her partner was in parliament.
She said everyone in Parliament is still locked in, and said her partner had been in touch: "He understood that there'd been an incident on Westminster Bridge, and that a police officer had been stabbed.
"He texted to say that he's still in there and they won't let them out, and there's a suspected package in a car, so at the moment, I'm just going to wait for him to come out.
"I don't know how long he's going to be, but it's obviously very important for them to secure the area before they let them out."
My staff and I are safe. Thoughts and prayers with those who are injured and the Police who daily put themselves at risk to keep us all safe
Police and security staff have ensured many of us are safe in difft places round Parliamentary estate. Huge thanks. Awaiting further news.
Locked in chamber. Switching phone off now. Everyone stunned, concerned and hearts filled with sadness for our poor policeman and his family
The Liberal Democrat MP for North Norfolk Norman Lamb has tweeted to say he and his team is safe in New Scotland Yard.
One woman has died and a number of others have been hurt - including some with "catastrophic" injuries - in the incident on Westminster Bridge, a junior doctor at St Thomas' Hospital has said.