U.S. Secretary of State John Kerry is in Norway, where he will meet Iran's foreign minister over renewed Iranian complaints that it's not getting the sanctions relief it deserves under last year's landmark nuclear deal.

Kerry is to see Foreign Minister Mohammad Javad Zarif in Oslo Wednesday, just a day after Iran's supreme leader accused the U.S. of not living up to its commitment to ease sanctions under the agreement that gave Iran the relief in exchange for curbing its nuclear program. U.S. officials say the sanctions have been eased and that Iran's complaints are due to foreign firms' wariness to do business with the country for other reasons.

After meeting Zarif, Kerry is to address a conflict resolution forum and meet Norwegian officials before visiting an Arctic research station.