Ontario's police watchdog has been notified following an officer-involved shooting in the city's west end.
Ontario's Special Investigations Unit is now investigating the incident.
Windsor Police responded to a report of a robbery in the 3200 block of Sandwich Street around 6 p.m. Wednesday.
Police say the suspect was tracked to the area of Rankin Avenue and Wyandotte Street East, where officers located a man armed with a knife.
During the encounter, the suspect was shot by police. He was transported to hospital with life-threatening injuries.
Paul Smith says he watched the entire incident unfold and says he dropped to his lawn to take cover when the shots were fired.
"I was sprawled out on the front lawn, and maybe 60 metres up, that's when you see the suspect running... or walking I mean... and the rest of the police just surround him. And... I was in fear."
Brad Tayles says he also saw the incident happen.
He says the suspect had a huge knife but police acted quickly.
"Literally it was about a 12-inch blade, and within seconds there was two squad cars, and all I hear is 'drop the knife, drop the knife', and I'm telling you, I've never seen more professional performance [by police]... they had like a half-moon."
He says the man was walking around with the knife.
"He just kept backing up, backing up, and he's kind of waving it still and I was like 'oh man, this is not going to be good'. Sure enough, I'm standing on the corner and all I hear was pop, pop, pop."
Tayles says he doesn't know what happened before police showed up.
"When I walked out of the door at work here, he was standing in front of the ATM with literally a 12-inch knife. So, maybe there was a robbery... I don't know, but it was right here. The police did an amazing job."
Rankin Avenue remains closed to public access between Wyandotte Street West and University Avenue.
Since the SIU has taken over the investigation, Windsor Police are unable to provide further information.
-with files from CTV Windsor's Sanjay Maru