LKAB operates iron ore mines in Kiruna, Svappavaara and Malmberget in Norrbotten County, Sweden. Most of the output is transported by rail to the ice-free Port of Narvik, a route named the Northern Circuit. A minority of the ore is transported to Luleå on the Southern Circuit. Located on the Baltic Sea, ore is shipped to Baltic customers, or delivered to furnaces operated by SSAB in Luleå and Oxelösund. The Ore and Ofoten Lines are long, including the branch to Svappavaara, with the route from Kiruna to Narvik being , and from Malmberget to Luleå being . Operations are handled by LKAB's subsidiary Malmtrafik i Kiruna (MTAB) in Sweden, and Malmtrafikk (MTAS) in Norway. Daily there operate 11 to 13 trains in each direction on the Northern Circuit, and five to six trains on the Southern Circuit.