"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.
Drone strikes target multiple Russian regions, hit oil refinery in Nizhny Novgorod

LATEST: '4 out of 4' — Russian Lukoil oil refinery struck by multiple Ukrainian drones, military intelligence source claims
Ukraine launched waves of drone attacks targeting oil and power facilities in western parts of Russia overnight on Jan. 29, according to local officials.
Drone strikes were reported across several Russian regions, including the Nizhny Novgorod, Smolensk, Tver, and Bryansk regions, causing fires and prompting air defense responses.
The Kyiv Independent can't immediately verify the reports.
While there were no reported casualties, an oil refinery in the city of Kstovo, Nizhny Novgorod, sustained significant damage. Local Telegram channels reported that drones targeted the "Lukoil Nizhegorodnefteorgsintez" oil refinery, resulting in a large fire.
Video footage circulating online showed flames at the facility, which local monitoring channels identified as the likely target of the attack.
Governor Gleb Nikitin confirmed that air defense systems had shot down multiple drones, and fragments from the intercepted UAVs fell on the industrial site. No injuries were reported.
In the Smolensk region, Governor Vasily Anokhin reported a "massive drone attack" on civilian infrastructure. One drone was intercepted while attempting to strike a nuclear energy facility. Nearby, air defenses also destroyed several drones around the town of Andreapol, home to approximately 8,000 people, in the Tver region, according to the local governor.
The Russian Ministry of Defense also announced that air defense systems had shot down 26 drones in the Bryansk region. Bryansk lies west of embattled Kursk Oblast, north of Ukraine's Chernihiv and Sumy oblasts, and east of the Belarusian border.
Despite the scale of the attacks, no injuries or damage were reported in the area.

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