04/23/2015 09:00 EDT | Updated 07/19/2015 04:59 EDT

Port Metro Vancouver fire was accidental investigation finds

The Vancouver Fire Department has concluded the Port Metro Vancouver container fire in March was accidental, but was unable to pinpoint its cause.

The four-alarm chemical fire forced hundreds in the city's downtown core to stay indoors for several hours as fire crews battled heavy, toxic smoke.

The container fire was fuelled by trichloroisocyanuric acid, an industrial disinfectant that had come from China, and was waiting to be loaded onto a train bound for Eastern Canada.

Vancouver Fire Department Capt. Brian Hutchinson said full details of the investigation will be released sometime today.