Police, ministry of labour investigating cause of fire that killed 1 worker at St. Catharines facility

Niagara Regional Police Service (NRPS) are looking for video from the explosion and fire that killed aworker at a hazardous waste facility in St. Catharines, Ont., as they continue to investigate the circumstances around the Jan. 12 incident.

ASt.Catharines man in his 30s died "due to his injuries,"police said, a dayafter the manwas rushed tohospital in critical condition.

Police previously said emergency crews were called to the Ssonix Products facility at 20 Keefer Rd. just after 6:30a.m. ET. The company's website said itsline of business includes producing gasoline, kerosene, distillate fuel oils, residual fuel oilsand lubricants.

St. Catharines firedepartment Chief Dave Uppersaid last weekthe manwas working there and the only person at the facilityat the time of the explosion. Hewas initially taken to a local hospital, but latertransferred to the burn unit atSunnybrook Health Sciences Centre in Toronto.

Crews were able to extinguish the fire after evacuating the neighbourhood for several hours.About 50 residents had to leave their homesbutwere able to return tolater in the day.

In an update Tuesday, NRPS said its detectivesare "working with the Ontario's Office of the Fire Marshall, the St. Catharines Fire Service, the Ministry of Labour and the office of the coroner to determine the circumstances and cause of the explosions and fire."

"Investigators are appealing to the public who may have video of the explosion and fire especially in its early stages," NRPS said Tuesday.

The Ministry of Labour told CBC Hamilton aninspector,occupationalhygienist and engineer have been assigned to the ongoing investigation.

A day after the incident, theOntario Ministry of the Environment, Conservation and Parkssaid it was on the scene "to assess the extent of the impacts, including collecting samples," spokesperson Gary Wheeler wrote in an email to CBC News on Friday.

"The ministry will ensure the owner takes all necessary steps to clean up the impacts"to the environment, Wheeler said, adding thatprior to the fire, there were no complaints or ongoing environmental compliance issues at Ssonix.