Ottawa (dpa) - A heavy bus accident in Canada's capital Ottawa in the midst of rush hour has cost at least three people the life.

A two-story city bus rammed a covered stop on Friday afternoon (local time) for reasons that are still unclear, whose roof drilled into the first rows of seats on the upper deck.

Two passengers in the bus and a waiting at the station were fatally injured, as Ottawa's police chief Charles Bordeleau announced. Most of the 23 partially seriously injured were taken to hospitals, as the newspaper "Ottawa Citizen" wrote on the night of Saturday.

The cause of the accident at the stop Westboro Station line 269, which connects Ottawa city center with the suburb Bridlewood, was initially unknown. The police took the bus driver to the station for questioning, as the Ottawa Citizen further reported. It may be said that the icy weather contributed to the disaster. The bus was full according to passengers, in the corridor travelers had confessed.

In photos, the heavily demolished upper bus front was visible. The roof of the station had slid over the first upper rows of seats under the bus roof, as shown in a photo on the homepage of the local station Blackburn News.

That's why most seriously injured people have been on the upper deck, said Bordeleau. There, several passengers were jammed with such force that rescue workers had to free them from their plight. Bordeleau spoke of a "very difficult and chaotic scenery" for the emergency services.

An eyewitness reported to the "Ottawa Citizen" that the bus had hit a piece of ice before arriving at the station at around 3.50 pm (local time). Bilal Gill, sitting in the back of the upper deck, told CBC that the bus had streaked a bit and started to roll.

The driver had not regained control, the bus had then crashed into the bus shelter. "Many people were screaming, people in front were being jammed under their seats," Gill said. The police had then quickly been on hand and smashed discs to recover the injured.

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