Ukraine's National Security and Defence Council met on Friday to discuss measures Russian President Vladimir Putin's proclamation of Moscow's annexation of a swath of Ukrainian territory.
"Measures that must be taken to ensure the collective security of the Euro-Atlantic space and Ukraine were discussed," President Volodymyr Zelenskiy's official website said.
It said that such measures should include implementation of a nuclear deterrence strategy against Russia by Ukraine's allies.
(Reporting by Max Hunder, Editing by Timothy Heritage)
