The announcement follows mounting fears that the two nuclear-armed countries were on the brink of engaging in another full-scale war.
"We agreed that a full and unconditional ceasefire must begin on Monday, May 12, for at least 30 days. We jointly demand this from Russia, and we know we are supported in this by the United States," Zelensky said.
Ukrainian media outlet ZN.UA reported on May 10 that their law enforcement sources confirmed an ongoing probe by the National Anti-Corruption Bureau into suspected embezzlement, money laundering and bribery.
Iran is preparing to send Russia Fath-360 short-range ballistic missile launchers, Reuters reported on May 9, citing Western security and regional officials familiar with the matter.
"Ukraine and all allies are ready for a complete unconditional ceasefire on land, in the air, and at sea for at least 30 days, starting as early as Monday," Ukraine's Foreign Minister Andrii Sybiha wrote.
U.S. President Donald Trump has acknowledged in private that Russia is difficult to negotiate with because they "want the whole thing," referring to Ukraine, the WSJ reported, citing sources familiar with the comments.
The visit marks Merz’s first trip to Ukraine, and the first time all four leaders have travelled there together.
A notice about the airspace closure was published on the U.S. Defense Department's NOTAM (Notice to Airmen) website on May 10, as cited by Ukrainian defense news outlet Militarnyi.
"As in the past, it is now for Russia to show its willingness to achieve peace," the EU's statement reads.
Kremlin spokesperson Dmitry Peskov rejected the idea of a 30-day ceasefire between Russia and Ukraine, claiming in an interview with ABC News on May 10 that it would be "an advantage" for Ukraine.
"Our involvement in the war was justifiable, and this belongs to our sovereign rights," North Korean dictator Kim Jong Un said. "I regard this as part of the sacred mission we must execute for our brothers and comrades-in-arms."
The number includes 1,310 casualties that Russian forces suffered over the past day.
"We have a plan B and a plan C. But our focus is plan A, the essence of which is to get everyone's support" for Ukraine's accession, EU foreign policy chief Kaja Kallas said.
US lawmakers call for Biden to allow Poland to down Russian missiles over Ukraine

Two U.S. lawmakers have made a bipartisan appeal to President Joe Biden to allow Poland to shoot down Russian missiles over the skies of Ukraine, The Hill reported on Oct. 30.
Republican Joe Wilson and Steve Cohen, the chair and ranking member respectively of the U.S. Helsinki Commission, made the call in a letter seen by the news outlet.
"Despite Russia’s continued escalation through hybrid warfare — airspace violations, attacks on critical infrastructure, and efforts to destabilize democratic institutions — we have hesitated to confront these threats decisively, allowing Russia to wage a war against the alliance with minimal consequences," they said.
"In this context, Poland’s request to intercept and neutralize missiles over Ukraine is both necessary and urgent as a support mechanism for Ukraine and a safeguard to the frontline of NATO’s borders."
The possibility of Warsaw downing Russian missiles heading toward Poland through Ukraine was laid out in June in a signed Polish-Ukrainian security agreement.
While Polish Foreign Minister Radoslaw Sikorski said at the time that the matter was still under discussion, Defense Minister Wladyslaw Kosiniak-Kamysz explained that a decision by all of NATO's member states would be necessary to take this step.
Then-NATO Secretary General Jens Stoltenberg opposed the move, insisting the alliance "will not be involved in this conflict."
Stoltenberg's successor, Mark Rutte, has yet to address the topic publicly.
Sikorski revisited the issue in September when he said he was in favor of shooting down Russian missiles in Poland, warning of a potential nuclear disaster
He said Poland has the legal right to down stray Russian missiles and drones that enter Polish airspace.
"Russia can no longer...dictate to us how we defend our own country. We have both a constitution and recognized in international law to defend our airspace," Sikorski said.
He warned that a Russian missile could hit a Ukrainian nuclear power plant, referencing the Chornobyl disaster of 1986 that leaked radiation across Ukraine and Belarus. A similar nuclear disaster could also impact Poland.
"I think we should help Ukraine to protect its nuclear power plants against such stray Russian missiles," he said.

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