The raw materials company Nidhogg Resources has had three exploration permits extended by the Swedish Mining Inspectorate, according to three separate press releases.The exploration permits are extended in all three cases until April 25, 2029. They apply to Sellnäsfältet and Tuna-Hästberg in Borlänge Municipality, Dalarna County, as well as Klintberget No. 3 in Hagfors Municipality, Värmland County.