'We condemn this barbaric attack': World reacts to Russian invasion

Taoiseach Micheál Martin said Russia "will pay a high price for this outrageous act of aggression".

European Commission President Ursula von der Leyen said Russia must withdraw its military and fully respect Ukraine's territorial integrity.

European Commission President Ursula von der Leyen has said her thoughts are with the people of Ukraine "in these dark hours" and that Russia will be held accountable for its actions. 

"We strongly condemn Russia's unjustified attack on Ukraine," she wrote.