The Kremlin warned on Tuesday that the world was heading into a "dangerous" moment as the last U.S.-Russia nuclear treaty is set to expire this week.

New START, the last nuclear treaty between Washington and Moscow after decades of agreements dating to the Cold War, is set to expire on Thursday, and with it restrictions on the two top nuclear powers.

Cuba's government on Monday told AFP that it was in "communication" with U.S. President Donald Trump's administration but not yet in formal talks on a deal to end Washington's pressure campaign on the island.

"Today we cannot talk about having dialogue with the United States, but it is true that there have been communications between the two governments," deputy foreign minister Carlos Fernandez de Cossio said in an interview.

NATO chief Mark Rutte was in Kyiv on Tuesday for a surprise visit just hours after Russia launched its largest drone and missile attack so far this year.

Ukrainian President Volodymyr Zelensky posted a video of the pair laying flowers at a memorial in central Kyiv to soldiers killed in the Russian invasion.

Former President Bill Clinton and former Secretary of State Hillary Clinton agreed late Monday to testify in a House investigation into convicted sex offender Jeffrey Epstein, but the Republican leading the probe said an agreement had not yet been finalized.

Rep. James Comer, the chair of the House Oversight Committee, continued to press for criminal contempt of Congress charges against both Clintons Monday evening for defying a congressional subpoena when attorneys for the Clintons emailed staff for the Oversight panel, saying the pair would accept Comer's demands and "will appear for depositions on mutually agreeable dates."

France's delayed budget for this year is set to pass Monday, clearing the way for higher military spending promised by President Emmanuel Macron to confront threats linked to Russia's war in Ukraine and Mideast conflicts.

The expected adoption of the budget marks the final step of a monthslong, chaotic process that exposed deep divisions in the fractured Parliament, which proved unable to reach a compromise. Prime Minister Sébastien Lecornu ultimately opted to use his special constitutional power to pass the bill without a vote. He is widely expected to survive two no-confidence votes on Monday evening.

European Union foreign policy chief Kaja Kallas on Monday rejected calls for a Europe-wide army, warning that it could be "extremely dangerous" as the bloc considers ways to provide its own security after the United States warned that its priorities lie elsewhere.

Talk of a European army has resurfaced amid tensions within NATO over President Donald Trump's threats to annex Greenland, the semiautonomous territory of NATO-ally Denmark.

Russia has confirmed that talks with Ukraine and the United States in Abu Dhabi that were meant to take place over the weekend have been moved to Wednesday, blaming a scheduling issue for the delay.

"They were indeed originally planned for this past Sunday. But additional coordination of the schedules of the three parties was needed," Kremlin spokesman Dmitry Peskov told reporters, adding: "Now, on Wednesday-Thursday, the second round will indeed take place. It will be held in Abu Dhabi. We can confirm that."

A Ukrainian drone attack on Russia's border region of Belgorod killed two civilians, the regional governor said Monday.

The overnight strike hit a residence which caught fire and partially collapsed in the town of Stary Oskol, north of the Ukrainian border, governor Vyacheslav Gladkov said on Telegram.

Iran said Monday it expected a framework for negotiations with the United States would be ready in the coming days, as President Donald Trump threatens military action against Tehran.

"Countries of the region are acting as mediators in the exchange of messages," foreign ministry spokesman Esmaeil Baqaei said, without giving details on the content of any prospective negotiations.

Iran said Monday it had summoned all of the European Union ambassadors in the Islamic Republic to protest the bloc's listing of the paramilitary Revolutionary Guard as a terror group.

The move comes as Iran faces the threat of U.S. military action in response to the killing of peaceful demonstrators and over possible mass executions. The American military has moved the USS Abraham Lincoln and several guided-missile destroyers into the Mideast. It remains unclear whether President Donald Trump will decide to use force, though regional countries have engaged in diplomacy in an effort to halt a new Mideast war breaking out.