Leaders of Britain, France, Germany and Poland will hold a symbolic visit to Ukraine in Kiev on Saturday, the day after Vladimir Putin held a military parade in suit in Red Square. The visit was due to the United States warning of wisdom that a large-scale air strike in Ukraine is about to take place.

In a statement issued late Friday, Downing Street said Keir Starmer, Emmanuel Macron, Friedrich Merz and Donald Tusk are expected to arrive in Kiev early Saturday and will meet with President Volodymyr Zelenskyy in recognition of support for Ukraine.

"The leaders of our France, Germany, Poland will be united with Ukraine against Russia's barbaric and illegal full-scale invasion," the four leaders said in a joint statement.

Four European leaders will reiterate calls for an unconditional ceasefire in conflict during the visit, which Donald Trump and the U.S. government said could be the first step to reaching a sustainable peace agreement. Ukraine said it was ready for implementation, but so far, Russia has refused.

Instead, Moscow unilaterally announced a three-day ceasefire starting on May 8, with Kiev aiming to avoid Ukrainian drone attacks celebrating Russia’s 80th anniversary of the victory of the Soviet Union in World War II, held in Moscow on Friday. Both sides said that during the so-called ceasefire, combat had been along the front lines, but Russia largely avoided drone and missile attacks on Ukraine.

But as leaders are already on their way to Ukraine, the U.S. Embassy in Kiev publicly warned Friday night that it had received intelligence on “any potentially major air strikes that could occur in the next few days.” It provides no more details.

The four European leaders are expected to visit Maidan, Kiev on Saturday morning, where thousands of flags have been planted to remember those killed in the war with Russia and then sit down with Zelenskyy. Later, Downing Street said the five will attend a virtual meeting to introduce other leaders to the progress of what is called “air, land, maritime and regenerative forces”, which is part of the peace agreement.

"We are ready to support peace negotiations as soon as possible, discuss the technical implementation of the ceasefire and prepare for a comprehensive peace agreement," the statement said.

"We will continue to increase our support for Ukraine. We will increase pressure on the Russian war machine before Russia agrees to a lasting ceasefire."

On Friday, thousands of troops crossed the Red Square as Putin held his annual Victory Day parade. Many world leaders participated in the competition, most notably China's Xi Jinping, Brazilian President Luiz Inácio Lulada Silva.

Robert Fico and EU member Slovak Prime Minister and EU hope Serbian President Aleksandarvučić also participated in the march, which sparked stimulation from other European leaders.

"All those who truly support peace cannot stand with Putin. Those who truly support peace should be in Ukraine tomorrow, not Moscow," the top EU diplomat said on Thursday. Foreign ministers from numerous EU countries and Britain, David Lammy, traveled to Leviv on Friday to declare the basis of Russian war crimes in Ukraine.

Saturday’s visit to Kiev may focus more on Ukraine’s common position in Ukraine, bringing it to Donald Trump as European leaders try their best to keep the United States present. So far, the Trump administration seems to have been much harder in Kiev than Moscow, but mood in Washington may be changing after Trump and the Vatican held a positive meeting under the sight of the pope’s funeral.

Even Vice President JD Vance, seen as the most skeptical voice of Ukraine support, has criticized Moscow's position in recent days. "At the moment, Russians are asking for certain requirements, a set of concessions to end the conflict. We think they are asking for too much," he said on Wednesday.