The first level is the conclusion of a peace treaty or ceasefire agreement along with the reinforcement of the Ukrainian Armed Forces, while the second level will already include guarantees from the US and European countries, Rite said.

Now, the first thing that is discussed is the financing of the Ukrainian army, weapons, and diplomacy.

The decision on the deployment of a foreign contingent on the territory of Ukraine has not yet been made, this issue is being discussed, the NATO leader added.

"We need such a level of guarantees that [Russian dictator Vladimir] Putin, sitting in Moscow, would never again think of attacking Ukraine," Ukrainian publication RBC quoted the NATO secretary general as saying.

Volodymyr Zelensky, for his part, said that Kiev and Europe had reached an agreement with the United States.

"The United States is ready to participate in Ukraine's security guarantees. This is the first time we have achieved exactly such readiness," the Ukrainian president stated.

Zelensky hopes that a clear architecture will be developed, from which it will be clear what support which countries are ready to provide to Ukraine.

For example, he said, Turkey has already expressed its readiness to support Ukraine from the sea.

Zelensky also reiterated that he was ready to meet with the Russian dictator.

"Ukraine, unlike Russia, is not afraid of any face-to-face talks with leaders," he said.

Security guarantees for Ukraine must be strong, Rite said.

"We do not want a repeat of the Budapest Memorandum or the Minsk Agreements," the NATO leader stressed.

Moscow signed the Budapest Memorandum in 1994, which aimed to guarantee Ukraine, Belarus and Kazakhstan security and border inviolability in exchange for them giving up their Soviet-era nuclear weapons. Russia violated the memorandum by first occupying parts of Ukrainian territory - Crimea and eastern Donbass - in 2014, and then launching a full-scale war against Ukraine in 2022.

The Minsk agreements on the settlement of the armed conflict in Donbas, which were reached in 2014 and 2015 with the participation of Western countries, were also not implemented.