A train operated by Rio Tinto's Iron Ore Company of Canada has derailed in Quebec and its conductor was missing following an apparent landslide, the Canadian iron ore miner said. Early information indicated a landslide had caused the derailment of the train, which was transporting empty cars from Sept-Îles, Quebec, and was found submerged in water, the miner said in a statement. The company said all railway traffic was suspended until further notice. "We will do our own investigation to determine the cause," said Claudine Gagnon, a spokeswoman for Rio Tinto. "Our priority is to find our employee." In a separate statement, the Transportation Safety Board said it was investigating the derailment.   Derailments have become a particularly sensitive issue in Canada since a crude oil train crash in Lac-Megantic, Quebec, in July 2013 that killed 47 people. That train had only one conductor, an unusual practice in the North American railway industry. The only other railway cleared to run one-person trains in Canada was the Quebec North Shore and Labrador Railway. Quebec Provincial Police said they received a call at around 7:30 a.m. ET Thursday about the train's derailment in a remote location north of Sept-Îles. Police had difficulty accessing the site, about 950 kilometers northeast of Montreal. "It's a very isolated site, located in the forest," said Sergeant Claude Doiron of the Sûreté du Québec. Iron Ore Company of Canada, majority owned by Rio Tinto, owns and operates the Quebec North Shore and Labrador Railway, which links its mine to port facilities. (Reuters)