Canada's Transportation Safety Board is investigating after a westbound CP freight train derailed between Kingston and Ottawa.

Officials say a section of of the train went off the tracks at around 1:30pm Wednesday, near the station at Smiths Falls.

At least one of the the rail cars was carrying some sort of hazardous material, but the TSB was not immediately able to say what it was.

There are no leaks or injuries reported.

The clean-up is expected to delay most VIA Rail trains on the Toronto-Ottawa-Montreal line well into Wednesday night.

VIA says some passenger trains along the route are being replaced with buses until normal service resumes.

Company spokesperson Mylene Belanger says 10 trains had been delayed as of Wednesday evening, affecting roughly 800 passengers.

To check the status of your Via Rail train, click here -- or call, toll-free 1-888-VIA-RAIL.