Edmonton police are investigating as acts of terrorism an unprovoked knife attack on an officer who was controlling traffic outside a football game and a high-speed chase of a moving van that struck and injured four pedestrians.

Here is what some had to say about the violence that unfolded:

"None of our citizens, Muslim or other, support this kind of activity. This is an individual that has to be held accountable for his specific actions." -- RCMP assistant commissioner Marlin Degrand

"From all indications, it appears that this was a single individual acting alone. We have no reason to believe there is any threat to our city." -- Edmonton police Chief Rod Knecht

"The Government of Canada and Canadians stand with the people of Edmonton after the terrorist attack on Saturday that sent an Edmonton Police Service officer to hospital and injured a number of innocent people who were out to cheer on their football team and to enjoy an evening in their city. I am deeply concerned and outraged by this tragedy." -- Prime Minister Justin Trudeau

"The horrific events last night in downtown Edmonton have left us shocked and angry. It's left us shocked at the indiscriminate cruelty and angry that someone might target their hatred at places where we gather with our families and friends." -- Alberta Premier Rachel Notley

"Random acts of sick people are difficult to anticipate. We are in a responsive mode on this but I believe the response is well-co-ordinated, calm, appropriate. It was swift." -- Edmonton Mayor Don Iveson

"We condemn the cowardly terror attacks on a police officer and pedestrians that occurred late last night in Edmonton, Canada. Law enforcement authorities from the United States are in touch with their Canadian counterparts to offer assistance with the ongoing investigation. Our thoughts and prayers are with the victims, as we hope for their speedy and complete recovery." -- White House statement

"Saddened for my home province of AB, terrorism has no place in Canada. Wishing a speedy recovery to Γåòedmontonpolice officer and all injured." -- former prime minister Stephen Harper said on Twitter

"I strongly condemn this act. .YEG is a safe, peaceful city that I am proud to call home. Thoughts are with the injured & Γåòedmontonpolice" -- federal Infrastructure and Communities Minister Amarjeet Sohi in a tweet

"We extend our utmost support to the EPS officer who was attacked last night. To all the men and women who wear the EPS uniform, thank you." -- Len Rhodes, president and CEO Edmonton Eskimos, on Twitter

"The Winnipeg Blue Bombers departed Edmonton International on a charter plane at approximately 2 a.m. MT without incident. We thank everyone for their care and concern and extend our thoughts to Edmonton police officer injured and citizens as a result of last night's attack." -- statement from the Winnipeg Blue Bombers

"Edmonton will band together in the face of terror. We won't be divided. Our thoughts and prayers are with those affected. .edmontonstrong." -- former Edmonton Oiler Ryan Smyth on Twitter

"Our thoughts and prayers are with the victims of the Edmonton attacks and their loved ones." -- former NDP Leader Tom Mulcair on Twitter.

"All Canadians have been, and will continue to be unequivocal: terrorist ideologies have no place in our country. Canada is not immune to the threat of terrorism. Only with unity, resolve and determination, will our great country defeat terrorism here at home and around the world." -- Federal Conservative Leader Andrew Scheer in a statement

"All Calgarians stand with our sisters and brothers in Edmonton in the wake of last night's terror attack. We all condemn this terrible act of violence and hatred ... I also know this: Albertans are resilient and this will not weaken the strong and diverse community that defines us." -- Calgary Mayor Naheed Nenshi in a statement

"Shocked by the suspected terror attack in Edmonton. I've reached out to Edmonton Mayor @DonIveson this morning to express my concern & my hope that those injured will recover quickly. We will continue to do everything we can to fight terrorism." -- Toronto Mayor John Tory on Twitter

"Our thoughts & prayers are w/ victims of last night's terrorist attack in #yeg. Saskatchewan stands with our friends in Edmonton & across AB." -- Saskatchewan Premier Brad Wall on Twitter

"We will not tolerate intolerance. We condemn hate here and across Canada. Thoughts and prayers are with the people of Edmonton." -- Manitoba Premier Brian Pallister in a tweet