NATO Secretary General Jens Stoltenberg said this at a briefing on September 30. 

It will be recalled that Russian dictator Vladimir Putin attempted to annex Ukrainian territories on September 30.

Putin, together with the leaders of the occupied Luhansk, Donetsk, Zaporizhzhya and Kherson regions, signed the so-called "agreement" on the annexation of part of Ukraine.

The dictator also threatened Ukraine and called to "sit down at the negotiating table." 

In response, President Zelenskyi said that Ukraine is applying to join NATO.