North Korean Troops Assemble in Russia’s Kursk Region, U.S. Officials Say

Several thousand North Korean soldiers have arrived in Russia’s western Kursk region, where they are expected to participate in a coming counteroffensive meant to dislodge the Ukrainian troops who have occupied a portion of the region since August, one Ukrainian and two American officials said on Friday.

The North Korean troops have not yet entered the fight, and it is not yet clear what role they will play, the officials said, speaking on the condition of anonymity to discuss sensitive intelligence matters. Whatever their role, the officials said, any significant contingent of North Korean troops will allow Russia to keep more of its forces in eastern Ukraine, where they can stay focused on seizing as much Ukrainian territory as possible before the harsh winter weather sets in.

For weeks, the governments of South Korea and Ukraine have warned that thousands of North Koreans were training alongside Russian soldiers, with Ukraine putting the figure as high as 12,000 troops. And this week, U.S. officials confirmed that a contingent of North Korean troops had been transported by ship to Vladivostok, a large Russian city on the Pacific Ocean, in what Defense Secretary Lloyd J. Austin III called a “very, very serious” escalation.

On Wednesday, the first North Korean troops had made the nearly 4,000-mile journey to the Kursk region, with thousands more arriving each day since. A senior Ukrainian official with knowledge of the troop movements said that as many as 5,000 North Korean troops were expected to have mustered by Monday.

The troops, according to the officials, are part of an elite unit of the Korean People’s Army. They are being flown from Vladivostok aboard enormous Il-76 transport planes to a military airfield in