Two miners were killed in Sudbury on Wednesday night at a Vale SA mine specializing in nickel, copper, and precious metals. Cory McPhee, vice-president of corporate affairs at Vale—the world’s second largest mining and metal company—believes the workers were killed by loose rock material. The company’s general manager in Ontario, Jon Treen, says the incident is a devastating loss and all efforts are being made to support grieving family members and employees. Vale SA is Sudbury’s largest employer, with 4,000 workers in the city. The mine will remain closed until Friday at the earliest.