Employees have been allowed to return to the Empire Mine following a fire Monday morning, but the mine remains temporarily shut down until further notice.
Jennifer Huetter, spokesperson for Cliffs Natural Resources, says a fire broke out just before 6:00 Monday morning.
A conveyor that feeds crushed limestone into the concentrator caught fire. Employees of the Empire were evacuated. No injuries have been reported.
The extent of the damage and the impact on future production is still being evaluated.
The cause of the blaze is under investigation. The Mine Safety and Health Administration has been notified.
The Tilden Mine and processing facilities are not affected.