The 28-member NATO will hold emergency talks on Ukraine Tuesday, the bloc announced Monday.
The upcoming meeting of the North Atlantic Council, which includes the ambassadors of all 28 NATO Allies, is convened at a request by Poland under article 4 of NATO's founding Washington Treaty, Xinhua quoted the NATO as saying in a statement.
Under article 4 of the Treaty, any member country of the bloc can request consultations "whenever, in the opinion of any of them, their territorial integrity, political independence or security is threatened".
The NATO said the developments in and around Ukraine are seen to "constitute a threat" to neighbouring Allied countries and "having direct and serious implications for the security and stability of the Euro-Atlantic area".