By declaring force majeur LKAB frees both its customers and itself from any liability or obligation concerning any contracts.
LKAB says the situation is so serious that they have no choice. "We've determined that we can't deliver the product to our customers according to their orders, that's why we are going out today and declaring force majeur," Lotta Fogde, communications director at LKAB, tells Swedish Radio.
Fogde says LKAB cannot make two-thirds of its deliveries and describes the situation as "damaging".
Every day, ten trains carry roughly 60,000 tons of iron ore from the mines in Kiruna to Narvik. From there, the iron-ore is shipped to the rest of the world.
Passenger trains have also been cancelled and replaced with busses.
Three Norwegian labor unions are striking for higher salaries.