KYIV -- Ukrainian President Volodymyr Zelensky signed a decree to put into effect the decision of the National Security and Defense Council (NSDC), which rules out holding any negotiations with Russian President Vladimir Putin, Zelensky's press service reported Tuesday.

The document, published on Zelensky's website, said that Ukraine's NSDC deemed holding talks with Putin "impossible."

With his decree, Zelensky also instructed the government to prepare proposals for the creation of a multi-level security guarantee system designed to boost Ukraine's defense potential.

On Sept 30, the NSDC adopted a decision aimed at guaranteeing Ukraine's security and restoring its territorial integrity following Moscow's formal recognition of four Ukrainian regions, which are partially controlled by Russia, as Russian territory.

Ukrainian and Russian negotiators held the latest round of face-to-face peace talks in Istanbul, Türkiye, on March 29.