Authorities say Russia has attacked the Ukrainian capital Kyiv with missiles and drones for the first time in 73 days. The assault came as the Pentagon said most of the more than 10,000 North Korean troops sent to help Moscow’s war effort are fighting to drive Ukraine’s army off Russian soil in the Kursk border region.

Russia has amassed a large force of tens of thousands — including recently arrived North Korean troops — to carry out an assault on the Ukrainian positions in Russia’s Kursk region expected in the coming days,

In the Ukraine conflict, Russia’s Su-35—a highly maneuverable “4++ generation” fighter—has faced stiff resistance from Ukrainian forces equipped with Western-supplied and Soviet-era defense systems, including F-16s.