Three people were killed and almost two dozen were injured on Friday (Jan 11) when a double-decker bus struck a bus shelter in the Canadian capital of Ottawa during rush hour, city officials said.
Bordeleau said the bus driver, initially arrested hours after the crash, has since been released unconditionally pending further investigation.
Police said investigators worked through the night to identify all three victims and contact their families and loved ones. He wouldn't say why she was detained rather than submitting to questions voluntarily.
Photos posted on Twitter showed extensive damage to the front of the bus, with the roof of a shelter well into the vehicle's second deck.
Graham said officers will also be taking measurements to try and determine how fast the bus was going when it got to Westboro station along the transitway, where the speed limit in that specific section is 50 km/h.
Police are asking OC Transpo to stop sending buses to the area to make it easier to access victims.
"An investigation is now underway on the cause of the collision", Bordeleau said.
"Our (city) community has been rocked today".
"My first thoughts are with those who have been injured and their families".
Monica Lung was on her daily bus ride home from Carleton University in Ottawa when she passed the horrific scene at Westboro station, where a double-decker bus jumped the curb and smashed into the transit shelter.
"It is with deep sadness that I report there were three confirmed casualties, two of which were on the bus and one that was on the platform", Ottawa Mayor Jim Watson told reporters at a news conference late on Friday.
Paramedics said it was too early to talk about fatalities. "Most of the most serious injuries occurred on the upper right side of the bus".
"This will be a long investigation", he said.
Ottawa Hospital's trauma center said it had received nine patients "in critical condition" from the crash.
"Something led us to having to arrest the individual and take them to the station", Bordeleau said.
OC Transpo general manager John Manconi told reporters the bus could have been holding as many as 90 passengers and that the agency would be co-operating fully with the investigation.