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.
State Department: Russia is playing 'very dangerous game' at Zaporizhzhia Nuclear Power Plant

The U.S. continues to monitor the conditions at the Zaporizhzhia Nuclear Power Plant following reports about strikes on the plant's main reactor containment, State Department spokesperson Matthew Miller said at a press conference on April 8.
"You have heard from us before our belief that Russia is playing a very dangerous game with its military seizure of Ukraine’s nuclear power plant, which is the largest in Europe," Miller noted. "It’s dangerous that they’ve done that and we continue to call on Russia to withdraw its military and civilian personnel from the plant, to return full control of the plant to the competent Ukrainian authorities, and refrain from taking any actions that could result in a nuclear incident at the plant."
The International Atomic Energy Agency (IAEA) reported on April 7 that the main reactor containment structures of the Zaporizhzhia Nuclear Power Plant had been directly struck at least three times. This marks the initial verified strike of its kind since November 2022.
The IAEA said on X that drone strikes had caused physical impact at one of the plant's six reactors and one casualty. "Damage at unit 6 has not compromised nuclear safety, but this is a serious incident with potential to undermine integrity of the reactor’s containment system," the IAEA wrote.
The Zaporizhzhia Nuclear Power Plant, the largest nuclear plant in Europe, has been under Russian occupation since March 2022. IAEA teams have been based at the facility on rotation since September 2022.

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