"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.
The announcement follows mounting fears that the two nuclear-armed countries were on the brink of engaging in another full-scale war.
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.
Russian media: Ukrainian forces allegedly hit air defense system in Belgorod Oblast

The Ukrainian military has allegedly hit a Pantsir S-1 anti-aircraft missile system in the village of Dubovoe in Belgorod Oblast, Pepel, a media outlet based in the region, claimed on June 22.
Air defense was operating at around 12:20 p.m. in the region, Belgorod Oblast Governor Vyacheslav Gladkov claimed. Several aerial targets were allegedly downed as they approached the city of Belgorod, he said.
As a result of the attack, grass was set on fire near the village of Dubovoe, according to Gladkov. The governor also claimed that the fire was promptly extinguished. The roofs of two houses and 17 cars were damaged in the village, he said.
No casualties were reported.
The Russian media outlet Pepel later claimed that a Pantsir surface-to-air missile system was hit. The system was struck by a cluster munition, while its crew survived, according to the outlet.
Black smoke was rising above the place where the Pantsir was located.
The Kyiv Independent could not independently verify the claims.
Ukrainian authorities have not commented on this attack at the moment of publication.
Belgorod Oblast borders Ukraine's Sumy, Kharkiv, and Luhansk oblasts. Claims of missile and drone attacks against the region have recently become a common occurrence after anti-Kremlin Russian militias' incursions into Russian territory.
The U.S. gave Ukraine permission to use American weapons to strike targets in Russia across the border from both Kharkiv and Sumy oblasts, Michael Carpenter, senior director for Europe at the U.S. National Security Council, told the TSN news program on May 31.

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