Six people have died following the crash between a bus and a train in Ottawa, authorities have confirmed.
Five people died at the scene, and a sixth person has died in hospital.
Emergency services took 31 people to hospital, 11 of whom were critical.
Ottawa Fire Services spokesman Marc Messier told CTV News the initial estimate was that five people have been killed.
He later told CBC News that six or more others have been taken to hospital with serious injuries.
VIA Rail, which operates the national passenger service in Canada, confirmed the crash and said there were no major injuries reported on the train.
Pascal Lolgis, who witnessed the crash, claimed the bus appeared to drive through a lowered crossing barrier.
“Boom! It went into the train like that,” Lolgis said.
’He just didn’t stop.”
The accident just outside a suburban station in the city's west end caused Via Rail to cancel trains on its Ottawa-Toronto route.
Witness Mark Cogan told C424 TV said the rail barrier was down.
"The train is going through," Cogan said. "And I was just looking around, just watching things happen.
"And noticed that in the bus lane, the double-decker bus ... I saw him, and he just kept going.
"I just thought maybe there's a side way around or something, but instantly, he just . he smoked the train.
"He went through the guard rail and just hammered the train, and then it was just mayhem."
The crash in Canada's capital city between a double-decker bus and a Via Rail train occurred about 8:48am local time (1.48pm BST)
CBC News reports all of Ottawa's emergency responders are heading toward the scene.
All the dead and injured were on the bus, authorities said.
Police in Canada have reported multiple fatalities in a collision between a passenger train and a city bus in Ottawa.
Multiple fatalities have been reported in a collision involving a passenger train and a city bus in Ottawa, according to police.