Andrew Borle was waiting for a bus on the other side of Westboro Station when the crash took place.
He says at least 20 people were injured. Twenty-three people were hurt and taken to hospitals, he said. Pictures posted to social media show a large presence of first responders at the busy transit station, and substantial damage to the front end of the bus.
"We are receiving many calls and we ask for your patience as we try and help you retrieve your belongings", police tweeted.
Ottawa Police Chief Charles Bordeleau provided an update to media on Saturday, January 12, at 1 p.m., alongside Sgt. Cameron Graham of the force's Collisions Investigations Unit.
Watson also said that 23 people were injured in the collision, some very seriously, and taken to hospital. The department said it would provide further information shortly.
The Ottawa Paramedic Service said Friday there are multiple critical injuries, though no immediate reports of fatalities. "And there was a bit of blood on the floor", Bilal Gill said.
It's the second fatal OC Transpo double-decker bus accident the city has witnessed in five years.
On the images was the hard wrecked the Front of the bus. This particular bus was not scheduled to stop at the Westboro station, which is another aspect being probed in the investigation.
"I saw ladders against it and I saw people getting pulled out the top and I wasn't sure what happened", she told CTV News Channel. "I think everyone on my bus felt the same, and then the whole way home no one was speaking".
"Such devastating news. My thoughts and condolences are with the victims, their families and all those affected by this tragedy", wrote Environment Minister Catherine McKenna, who represents the area in Parliament. In that case, an investigation found that the cause was a combination of excessive speed, a hard curve before the tracks and driver distraction from video monitors showing the upper deck.