The suspect fled the scene with at least a dozen police vehicles in pursuit.
In a 3am news conference, police chief Rod Knecht confirmed that there had found an Islamic State flag in the auto.
Knecht went on to state that the man – who was known to officers – was believed to have acted alone, but that investigations remain in their “very early” stages.
While the policeman did not have any life-threatening injuries, the condition of the pedestrians was not known, said the BBC, citing police.
Abdulahi Hasan Sharif, 30, is accused of going on a rampage through the city that injured four pedestrians and Edmonton police Const. Mike Chernyk.
While the Eskimos were battling the Winnipeg Blue Bombers inside the stadium, outside a white Chevy Malibu approached a traffic control post at a high speed. The impact sent the officer “flying 15 feet through the air”, according to a Police statement.
Dramatic photos from Global News showed the flipped U-Haul on its side with its windscreen smashed to pieces. Before fleeing, the driver jumped out of the vehicle and repeatedly stabbed the officer, police said. However, he also added that police would investigate possible involvement of a group.
Just before midnight, a U Haul truck was pulled over at a Checkstop location on Wayne Gretzky Drive and 112 Avenue. They recognized that the driver’s name was the same as or similar to the name under which the Malibu was registered.
The second attack, about four hours later, involved a U-Haul rental truck driven by the same man.
“He deliberately tried to hit pedestrians in crosswalks and alleys” at two different places, Rod Knecht, chief of Edmonton police, told reporters.
“They (police) were pulling him out of the windshield, then handcuffed him”, he said.
The name of the suspect was not released.
Public Safety Minister Ralph Goodale said “Canada will not be intimidated by terrorist violence”.
The previous investigation, which occurred in 2015, concluded without enough evidence to pursue criminal charges, said Marlin Degrand, assistant commissioner of the Royal Canadian Mounted Police. Canada’s government said it would keep the terror threat level at medium, where it has been since late 2014.