Three people were killed, along with the assailant, in Wednesday’s attack in Westminster, close to the Houses of Parliament.

It’s believed the assailant drove a car into pedestrians on Westminster bridge, before running into the courtyard of parliament and stabbing a police officer (Keith Palmer, 48, was stabbed as he tried to stop the attacker in a courtyard outside the Houses of Parliament.).

The Queen has sent her sympathies, releasing a statement saying:

“My thoughts, prayers and deepest sympathies are with all those who have been affected by yesterday’s awful violence.

“I know I speak for everyone in expressing my enduring thanks and admiration for the members of the Metropolitan Police service and all who work so selflessly to help and protect others.”

Canada’s Prime Minister, Justin Trudeau, gave his full support to Britain in the wake of the attack.

“On behalf of all Canadians, I offer our full support to Prime Minister May and to the people of the United Kingdom,” his statement noted.

“We stand ready to offer all possible assistance to the British government, to do what we can to bring to justice those responsible for this heinous act.”

The Prime Minister also posted the following tweet:

Ellen DeGeneres took to Twitter as the news came in, writing: