A senior adviser to Ukrainian President Volodymyr Zelensky said that the country's government rejects the idea floated by Russia that Ukraine should adopt a Swedish or Austrian model of neutrality.
Mykhailo Podolyak said that Ukraine was now in a state of war with Russia, and the security model "can only be Ukrainian" with "legally verified security guarantees. And no other models or options."
"What does that mean?" he continued. "First, absolute security guarantees, which would mean that the signatories of guarantees do not stand aside in the event of an attack on Ukraine, as it is today."
Instead, they would "take an active part on the side of Ukraine in the conflict and provide us with an immediate supply of the necessary weapons."
The Kremlin said Wednesday “demilitarization” of Ukraine could be a compromise for Russia, suggesting a Swedish or Austrian model of a state.
"This is an option currently discussed and which could really be seen a compromise," Kremlin spokesperson Dmitry Peskov said in a regular conference call with journalists.
The head of the Russian delegation in talks with Ukraine, Vladimir Medinsky, earlier spoke about an Austrian or Swedish version of a neutral state in Ukraine with refusal to deploy foreign bases or enter the bloc, but at the same time with the presence of its own armed forces.
Podolyak said: "Ukraine has never been a militaristic state that attacks or plans to attack its neighbors ...That is why today Ukraine wants to have a really strong pool of allies with clearly defined security guarantees."
He also repeated the demand for a no-fly zone over Ukraine that would include both aircraft and missiles.
CNN's Sarah Dean contributed reporting to this post.