Ukrainian defenders successfully hold off Russian attacks in the south.

The IAEA said the incident is a matter of "serious concern" because the facility relies on a single remaining power line supplying electricity to the Zaporizhzhia Nuclear Power Plant.

The Air Force said Russia launched 293 drones, 264 of which were intercepted. At least 24 drones struck 11 locations, while falling debris was recorded at 12 sites.

All 27 EU member states have given the green light to open the first cluster of accession negotiations with Ukraine and Moldova, Prime Minister Yuliia Svyrydenko said on June 4 after an agreement between Kyiv and Budapest cleared the key hurdle.

The number includes 1,300 casualties that Russian forces suffered over the past day.

A Russian drone struck infrastructure in the Boryspil region of Kyiv Oblast overnight on June 4, sparking a fire at the site and injuring one person, Governor Mykola Kalashnyk said.

"Hungary cannot play the decisive role here; that's a matter for the major powers. We can provide diplomatic and humanitarian aid, and Hungary could also be a venue for negotiations," Hungarian Prime Minister Peter Magyar said.

The U.S. House of Representatives advanced the Ukraine Support Act despite opposition from the Trump administration and Republican leadership, setting up a final vote on the measure on June 4.

Russian oil exports to Hungary and Slovakia via the Druzhba pipeline have returned to normal after a months-long outage that fueled tensions between Ukraine and the Central European countries.

Greece has issued formal diplomatic protests to Ukraine after an explosives-laden naval drone was discovered in the country's waters last month, the Greek Foreign Ministry said on June 3.

The visit comes only a day after one of Russia's heaviest attacks killed over 20 people and injured over 100 across Ukraine.

The attack coincided with the beginning of the 2026 St. Petersburg International Economic Forum, an annual conference of business leaders and government officials hosted by Russian President Vladimir Putin.

"Unfortunately, as of today, even the legal groundwork for this contract has yet to be completed," Zelensky added. "I have set a final deadline: one week for all preparatory steps. I expect a report on Friday — either there is clarity on implementing our Patriot agreement, or there will be serious personnel decisions."

Foreign Minister Andrii Sybiha called on Europe to use the European Peace Facility to buy U.S. Patriot systems and missiles for Ukraine.