NATO chief Stoltenberg warned Russia to stop its 'dangerous and irresponsible nuclear weapon rattling'.
He says the NATO has a'very clear message'; 'a nuclear war cannot be won, and should not be fought'.
He reminded Russia that their nuclear rhetoric is in breach of agreements to which Russia is also a signatory.
'The use of nuclear weapons will fundamentally change the conflict, as will the use of chemical weapons. Any use of chemical weapons is unacceptable and will have far-reaching consequences'.
The secretay general spoke these words on the eve of president Biden's journey to Europe for a number of top meetings with NATO, the EU and G7.
'It is a crucial moment, now that we are faced with the biggest threat to security since the end of WW2'.
In that light, the NATO will also convene on the topic of China.
Stoltenberg says that 'China supports Russia politically, including the spread of blatant lies and desinformation.'
He expects that NATO leaders will ask China to take responsibiliy as a permanent member of the UN Security Council.
He added that the NATO will start playing a more active role in partner nations, in keeping the sovereign integrity intact, and defending the freedom of nations to make their own choices, specifically mentioning Georgia and Bosnia-Herzegovina.
EDIT: In slightly hopeful news, 8 high ranking members of various Russian opposition parties have united themselves in an anti-war committee.
Amongst them are former oil tycoon Michail Chodorkovski, chess grandmaster Garri Kasparov, opposition leader Dmitri Goedkov, and Ljoebov Sobol, a trusted lieutenant of Aleksej Navalny.
The committee calls upon the Russian population to resist against the war.
"We represent different political streams, but now we have fused to form one anti-war committee, because we are of the opinion that Russia does not need this war. We have united, so the voices of Russians who are against the war can be heard across the world".
They also offer aid and protection for Russians that want to flee Russia, with legal aid and temporary shelter.