Ukrainian President Volodymyr Zelenskyy said on Tuesday that trilateral talks among Ukraine, the United States and Russia could take place within a week or 10 days, as U.S.-brokered peace efforts appear stalled.

However, Kremlin spokesperson Dmitry Peskov said the date for the next round of talks has not yet been agreed upon. Peskov said Russia hopes relevant work within the negotiation framework will continue. Moscow maintains a clear and consistent position on resolving the Ukraine issue, he said, adding that progress depends on Kyiv's specific actions.

He also said the goals of special military operation have not yet been achieved and that the operation will continue. At the same time, he stressed that Moscow remained open to achieving its aims through diplomacy, but he was not able to say when more talks would take place.

In a televised address to the European Parliament in Brussels marking the fourth anniversary of Russia-Ukraine conflict, Zelenskyy urged Ukraine's allies to sustain their support and continue defending the European way of life.

He said European Union (EU) membership would guarantee Ukraine's future security after a peace deal and that Kyiv aims to be ready by 2027. The EU is considering ways to grant Ukraine certain benefits of membership before full accession reforms are completed.

Zelenskyy also called for tighter sanctions on Russia and increased military assistance, particularly air defense systems. He criticized countries that continue to purchase Russian oil, saying such trade helps finance the conflict. On the same day, he announced sanctions against 29 Russian individuals and 15 Russian entities.

He invited U.S. President Donald Trump to visit Ukraine, saying that only by witnessing the situation firsthand could he fully understand the human cost of the conflict.

Meanwhile, Russia's Foreign Ministry said a settlement is impossible without addressing NATO expansion. Peskov said Western involvement has broadened the confrontation.

Analysts say deep divisions remain between Russia and Ukraine. Wang Jin, director of the Center for Strategic Studies at Northwest University, said both sides view disputed territories as central to political legitimacy, making a comprehensive one-off settlement difficult. He suggested that a phased arrangement beginning with a ceasefire and temporary de-escalation may be more realistic.

Cui Zheng, director of the Research Center for Russia, Eastern Europe and Central Asian Countries at Liaoning University, said territorial sovereignty and security architecture lie at the core of the dispute. Russia seeks recognition of its control over Crimea and four eastern and southern regions and demands that Ukraine abandon NATO membership aspirations, while Ukraine insists on full sovereignty and Western security guarantees.

"These opposing positions leave very limited room for compromise on core clauses of any agreement," Cui said, noting that weak enforcement mechanisms and the failure of previous accords, such as the Minsk agreements, further complicate prospects for a durable settlement.

Read more: Four years on, is the Russia-Ukraine conflict nearing an end?