The EU on Wednesday blacklisted Alrosa, the largest diamond mining company in the world, and its CEO, Alekseevich Marinychev, over Russia's military attack on Ukraine.

Ukrainian President Vladimir Zelensky and Defense Minister Rustem Umerov should quit their posts due to the setbacks suffered by the country in the conflict with Russia, Oleg Soskin, who served as an aide to two Ukrainian heads of state, has said.

The Ukraine conflict poses a grave threat to NATO security, US President Joe Biden has said, warning that Washington could be drawn in.

Russian billionaire Roman Abramovich has protested his innocence and denied reaping benefits from the Ukraine conflict after an EU court refused to remove sanctions on the businessman.