U.S. President Donald Trump has called for a 30-day unconditional ceasefire between Russia and Ukraine, warning that the United States and its allies will impose further sanctions if the proposal is not upheld.

Ukraine has expressed willingness to accept the U.S.-led initiative for an immediate 30-day ceasefire, while Russia has instead offered a limited three-day truce to coincide with Thursday’s 80th anniversary of the end of World War II.

In a statement posted on social media, Trump said: “If the 30-day ceasefire is not respected, the U.S. and its partners will impose further sanctions.”

“Hopefully, an acceptable ceasefire will be observed, and both countries will be held accountable for respecting the sanctity of these direct negotiations,” he added. “This ceasefire must ultimately build toward a Peace Agreement. It can all be done very quickly, and I will be available on a moment’s notice if my services are needed.”

While Trump has consistently vowed to bring an end to the war in Ukraine, his administration has warned it may step back from efforts to broker a peace deal if neither side demonstrates commitment to resolving the conflict.

Ukrainian President Volodymyr Zelenskyy confirmed on Thursday that he informed Trump during a phone call of Kyiv’s readiness to begin a 30-day ceasefire “starting this minute.” He emphasized that Russia must also show genuine intent to end the war by agreeing to an unconditional ceasefire.

Ukraine’s foreign minister accused Russia of breaching its own proposed three-day ceasefire within hours of implementation, calling the move a “farce.” In contrast, Moscow claimed that Kyiv continued to engage in combat operations.

Trump began engaging Russian President Vladimir Putin in talks back in February, seeking to fulfill a campaign pledge to end the war within 24 hours of returning to office. However, he has since expressed growing frustration with both sides as the conflict shows little sign of resolution.

Top U.S. officials have echoed that sentiment, signaling that Washington may reconsider its role as mediator if meaningful progress is not achieved soon.