In Russia, a major oil terminal near the port of Novorossiysk stopped operations Saturday after a strike by unmanned boats damaged one of its three mooring points, according to a statement from the Caspian Pipeline Consortium, or CPC, which owns the terminal.

"None of us really know what Zelenskyy is like operating solo, because he never has," one expert told NBC News.

Ukrainian President Volodymyr Zelenskyy announced the resignation of his powerful chief of staff, Andrii Yermak, whose residence was searched earlier in the day by anti-corruption investigators.

Widescale Russian attack on Ukraine kills six, injures dozens, as Kyiv seeks US support for a resolution to the war.

Ukraine and Norway agreed to jointly produce drones, with the pilot production line to be launched in 2026, Ukrainian Defense Minister Denys Shmyhal announced on Nov. 30. Shmyhal made the announcement after signing a corresponding agreement with his Norwegian counterpart,

Ukraine's gas facilities have suffered severe damage from Russian drone and missile attacks, forcing the country to import more gas

After working together during the successful presidential campaign of 2019, Yermak became Zelensky's chief of staff. He stood next to the president as he gave his now famous "we are still here" speech as the Russians descended on Kyiv at the start of their full-scale invasion in February 2022.