Russia is worried about increased activity of NATO forces in the Arctic and sees risks of "unintended incidents" occurring in the region, TASS news agency cited Russian ambassador-at-large Nikolai Korchunov as saying on Sunday. In March, Finland and Sweden, which are both considering joining the U.S.-led military NATO alliance, conducted combined NATO military drills. The exercise was long planned, but Russia's invasion of Ukraine on Feb. 24 added intensity to the war game. Moscow describes its actions in Ukraine as a "special military operation". "The recent increase in NATO's activity in the Arctic is a cause for concern. Another large-scale...