Russian troops have launched attacks from Belarus into Ukraine, with Belarusian support, the Ukrainian Border Security Service says at 5:00 GMT (GMT 07:00 GMT).
Russia has also reportedly launched an offensive in Crimea.
Russian President Vladimir Putin has announced a military operation in the Donbass region of eastern Ukraine.
Ukrainian President Volodymyr Zelenskyy declares martial law across the country, saying Ukraine is ‘winning’.
U.S. President Joe Biden has condemned the “unprovoked and unjust” attack on Ukraine, promising the world that “Russia will be held accountable.”
Members of the United Nations Security Council (UNSC) hold an emergency meeting amid mounting tensions.
UN Secretary-General Antonio Guterres has called on Putin to “stop troops from attacking Ukraine.”
The crisis escalated after Russian-backed separatists in eastern Ukraine sought support in Moscow.
