Ottawa, Reuters—A passenger train collided with a double-decker city bus on the outskirts of Ottawa and derailed on Wednesday, killing at least five people, an emergency official said.

The front of the red double-decker bus was sheared off and the engine of the VIA Rail train had derailed, but the train cars remained upright with little noticeable damage.

Ambulances and fire trucks swarmed the scene, and rail officials were helping train passengers off the train.

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 hospitalized 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. The crash occurred in the rural west end of Ottawa, Canada’s capital city, at a level crossing surrounded by corn fields.

Canadian Prime Minister Stephen Harper said he was “deeply saddened” to hear about the collision, which came just months after a runaway freight train crash and explosion killed 50 people in Lac-Megantic, Quebec.

“Our thoughts and prayers are (with) the families of those involved,” Harper said on Twitter.

Canada’s two big railroads—Canadian National Railway Co and Canadian Pacific Railway Ltd—are reviewing safety standards after the July 6 Lac-Megantic crash that destroyed the center of the small Quebec town.