Russia attacked the Ukrainian capital Kyiv with a sophisticated combination of missiles and drones for the first time in 73 days on Wednesday, authorities said, as the Pentagon said most of the 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 targeted eight regions of Ukraine, firing six ballistic and cruise missiles and 90 drones, the Ukrainian air force said. Air defences downed four missiles and 37 drones, and another 47 drones were stopped by electronic jamming, the statement said. The damage was being assessed.