The first incident happened when the man crashed a vehicle into a police barricade outside the stadium, where the Edmonton Eskimos were hosting Winnipeg on Canadian Forces Appreciation Night.
The police officer was not critically injured. The officer was stabbed multiple times before the suspect fled on foot. They later described him as a 30-year-old Edmonton man.
The officer's injuries are not believed to be life-threatening.
'It's not critical, ' Knecht said. "We know that Canada?s strength comes from our diversity, and we will not be cowed by those who seek to divide us or promote fear", he said.
A manhunt was underway when the suspect was pulled over at a police check stop on Wayne Gretzky Drive around three hours later driving a U-Haul. After crashing, the suspect leaped from the vehicle and began stabbing an officer of the Edmonton Police Service, according to Global News.
The U-Haul eventually overturned near a downtown hotel and police dragged the driver out of the truck.
When confronted, Knecht said the U-Haul sped off toward downtown with police cars in pursuit.
The U-Haul hit and injured four pedestrians before it flipped over.
Edmonton PD determined the driver of that truck was the stabbing suspect from earlier in the night.
US national security agencies strongly lean toward the conclusion that the suspect acted alone, though they are still reviewing the matter, a USA official told Reuters. Their conditions were not immediately known, the police chief said.
He was chased and arrested by police. His name has not been released.
Investigators believe the incident near Commonwealth Stadium and subsequent attempts to injure pedestrians in downtown Edmonton may be related.
The document also said CSIS is studying "behavioural indicators" that suggest an individual is moving from holding extremist ideas to taking action - whether it's travelling overseas, supporting others who plan to commit terrorist acts or plotting an attack in Canada or elsewhere.
Goodale's office issued a statement to say the RCMP's Integrated National Security Enforcement Team was working closely with Edmonton police.
Mr Knecht said they did not call off the chase of the van due to the seriousness of the crime.
Premier Rachel Notley tweeted her best wishes to the officer and all EPS members.