MINNEAPOLIS (AP) — About 625 people will be laid off when Cliffs Natural Resources idles a Michigan mine and cuts production at a Minnesota operation due to declining demand for iron ore, the company announced Monday.

Two of the four production lines at Northshore Mining’s taconite plant in Silver Bay will shut down effective Jan. 5, resulting in 125 layoffs, said Cliffs’ Minnesota spokeswoman Sandy Karnowski. It has not been determined how those layoffs will be distributed between the plant and Northshore’s mine in Babbitt, she said.