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.
Russia has violated ‘energy ceasefire’ more than 30 times, Ukraine says

Russia has violated a partial ceasefire covering energy infrastructure more than 30 times since it was agreed in March, targeting critical infrastructure across Ukraine, a Ukrainian Foreign Ministry spokesperson said on April 16.
“We regularly send detailed information on each of these violations to partner countries and the headquarters of international organizations,” Foreign Ministry spokesperson Heorhii Tykhyi said during a briefing, Ukrinform reported.
Tykhyi noted that three violations were recorded in the past 24 hours. Russian attacks damaged transformers in Mykolaiv Oblast and near Kherson and a power transmission line in Poltava Oblast.
He emphasized that Ukrainian officials are actively sharing information about the breaches with international partners, including the U.S.
The energy ceasefire was intended to shield power infrastructure from attacks and has been in place since March 25. Kyiv has repeatedly accused Moscow of repeatedly disregarding the arrangement.
Russian President Vladimir Putin agreed to a 30-day pause of energy infrastructure strikes during a call with U.S. President Donald Trump on March 18, allegedly ordering a halt of attacks on Ukraine's energy system.
The partial ceasefire agreed to in March also included a maritime truce in the Black Sea. As part of the arrangement, Washington pledged to help facilitate Russia’s agricultural and fertilizer exports by easing maritime insurance costs and improving access to ports and payment systems.
The Kremlin stated that its participation in the partial ceasefire in the Black Sea would only begin once certain Western sanctions were lifted.
Ukraine and the United States previously agreed to a complete 30-day ceasefire during talks in Jeddah on March 11. Russia rejected the proposal unless it included concessions that would undermine Kyiv’s ability to defend itself, including a full halt to foreign military aid.
While U.S.-led diplomatic efforts to end the war are ongoing, Ukrainian officials say Russia continues to insist on maximalist demands and has shown little willingness to pursue a comprehensive peace agreement. Kyiv maintains it is ready for a complete ceasefire if Moscow agrees to reciprocate.
Throughout the full-scale war, Russia has consistently targeted Ukraine’s power grid with missile and drone strikes. In response, Ukraine has used long-range drones to strike oil and gas facilities deep inside Russian territory.

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