UPDATE [13:44 ET] The Daily Mirror has released the first picture of a man believed to be one of the attackers on Parliament. The man appears to be a middle aged and asian in decent. A knife was also pictured under the foot of a police officer pulling security over the body, which was on a ambulatory stretcher.
RT and the Drudge Report have also posted the picture.
A timeline of events has been released by the verified twitter account of Breaking911.
UPDATE [12:53 ET] Scotland Yard Commander BJ Harrington told press a full counter terror investigation is underway, and that additional officers are deployed across London.
Craig Mackey, the acting head of the Metropolitan Police, was at the scene and while uninjured is a "significant witness".
British Prime Minister Theresa May is back in Downing Street and is "monitoring the situation". She'll be chairing emergency COBR meeting later today.
Below is a picture of Tory MP Tobias Ellwood attending to the wounded policeman.
Photo of Tory MP Tobias Ellwood - centre in glasses - with medical staff / police helping injured officer. pic.twitter.com/88s897h6Av— Ben Riley-Smith (@benrileysmith) March 22, 2017
UPDATE [12:46 ET] Colleen Anderson of St Thomas' Hospital said a woman died after a vehicle apparently hit pedestrians on Westminster Bridge, near Parliament.
"There were people across the bridge. There were some with minor injuries, some catastrophic. Some had injuries they could walk away from or who have life-changing injuries," Anderson said.
One of the first doctors on Westminster Bridge describes one confirmed dead, 12+ injuries, including this one: pic.twitter.com/NDC8cH2YrO— Paraic O'Brien (@paraicobrien) March 22, 2017
UPDATE [12:42 ET] Ben Riley-Smith, the Assistant Political Editor for the The Daily Telegraph, tweeted that Tory MP Tobias Ellwood -- a former soldier -- gave mouth-to-mouth resuscitation to the injured officer. Held stab wounds to stem bleeding.
UPDATE [12:35 ET] London's Muslim Mayor Sadiq Khan has tweeted a statement about the attacks:
Scotland Yard will make a public statement about the attack in approximately 15 minutes.
Sky News is now reporting that a second person has been killed.
UPDATE [12:14 ET] Sky News reports that one women has been anounced dead from the attack on Parliament.
"One woman has died and a number of others have been hurt - including some with 'catastrophic' injuries," a junior doctor at St Thomas' Hospital said.
Sky News also interviewed an eye witness named Bernadette:
"I saw a car go out of control", Westminster Bridge witness tells Sky News pic.twitter.com/y88GateuK3— Sky News (@SkyNews) March 22, 2017
UPDATE [12:04 ET] AP has interviewed an eyewitness named Rick Longley, who saw the stabbing attack on the UK police officer outside Britain's Parliament.
"We were just walking up to the station and there was a loud bang and a guy, someone, crashed a car and took some pedestrians out," Rick Longley said.
Rick Longley added:
"They were just laying there and then the whole crowd just surged around the corner by the gates just opposite Big Ben. A guy came past my right shoulder with a big knife and just started plunging it into the policeman. I have never seen anything like that. I just can't believe what I just saw."
UPDATE [11:41 ET] London police say they are treating a gun and knife incident at Britain's Parliament "as a terrorist incident until we know otherwise."
According to multiple sources two people have been shot outside UK Parliament and a loud bang has been heard nearby
(VERO BEACH, FLA) Gun shots and large explosions were heard outside UK Parliament on Wednesday afternoon.
A least a dozen people have been injured on Westminster Bridge after large bangs were heard outside the British parliament, a Reuters photographer said on Wednesday. They added that they were "bleeding heavily".
The Daily Mail is reporting that more than 10 people are said to have been hit by a car on Westminster Bridge.
"We were called at approx 2:40 pm to reports of an incident at #Westminster Bridge. Being treated as a firearms incident - police on scene," the Metropolitan police said on Twitter.
Radosław Sikorski, a Senior Fellow with CES Harvard, a Distinguished Statesman for CSIS, and a Senior Advisor with the Eurasiagroup, tweeted that a car mowed down five pedestrians before crashing into the gates outside Portcullis House.
A car on Westminster Bridge has just mowed down at least 5 people. pic.twitter.com/tdCR9I0NgJ— Radosław Sikorski (@sikorskiradek) March 22, 2017
It has also been reported that the man involved in the attack was seen with a knife near the scene. Sky News reports that the assailant was male, in his 40s, and was carrying a 7-8" long knife. RT is running a live feed.
A man claiming to be an eye witness to the vehicular attack named James West, tweeted a photo of the car crashed into the railing of Pariament.
Terror attack outside U.K. Parliament. 2 men down on road. Man with knife/machete got into Parliament and stabbed policeman. He's been shot pic.twitter.com/aYNktTiF4d— James West (@westicles69) March 22, 2017
Christopher Hope, the Chief Political Correspondent for The Daily Telegraph, who is inside UK Parliament, tweeted from his verified account that one man is receiving medical attention outside Westminster Hall, and that he heard an audible explosion.
Shots fired outside Parliament. Loud explosion then shooting. Man lying shot outside gates to Parliament. Gun shots outside, Frightening.— Christopher Hope (@christopherhope) March 22, 2017
Man receiving medical attention outside Westminster Hall. I heard loud explosion on Westminster bridge. Public running away— Christopher Hope (@christopherhope) March 22, 2017
Ben Riley-Smith, the Assistant Political Editor for the The Daily Telegraph, tweeted that police with shields were currently sweeping Parliament.
Armed police with shield now sweeping Parliament after shooting incident.— Ben Riley-Smith (@benrileysmith) March 22, 2017
John Stevens, the Daily Mail's Deputy Political Editotor, tweeted that an ambulance carrying the subdued intruder has left Partliament, and that a body remains on scene, covered by a red blanket, is thought to be a dead police officer.
Ambulance carrying intruder has left Parliament. The body of the person we think was police officer is dead, body covered by red blanket— John Stevens (@johnestevens) March 22, 2017
The leader of the House, David Lidington, said in the chamber that an assailant who stabbed a policeman had been shot by police.