Military officials from more than 30 nations will take part in Paris talks on the creation of an international security force for Ukraine, a French military official said Monday.

Such an international force would aim to dissuade Russia from launching another offensive after any ceasefire in Ukraine comes into effect.

Donald Trump, the real estate developer turned commander in chief, is laying bare his style of diplomacy in the early weeks of his new term: It's a whole lot like a high-stakes business deal, and his No. 1 goal is to come out of the transaction on top.

The tactics are clear in his brewing trade war with Canada and Mexico, in his approach to Russia's war on Ukraine and in his selection of the first country he will visit in his second term.

Iran said Monday it would not negotiate under "intimidation", after US President Donald Trump sought to ratchet up pressure on Tehran by ending a sanctions waiver that had allowed Iraq to buy electricity from its Shiite neighbor.

Iran's mission to the United Nations had indicated Sunday that Tehran might be open to talks aimed at addressing US concerns about the potential militarization of its nuclear program -- though not to ending the program completely.

Saudi Arabia is to host talks on Tuesday between the United States and Ukraine in a new diplomatic push after an argument erupted during President Volodymyr Zelensky's Feb. 28 visit to the White House.

The oil-rich kingdom may seem like an unusual venue for talks aimed at smoothing over relations after the blowup. But Saudi Arabia under its assertive Crown Prince Mohammed bin Salman has been positioning itself as an ideal location for possible peace negotiations between Kyiv and Moscow — and even the first face-to-face talks between Russian President Vladimir Putin and U.S. President Donald Trump.

U.S. President Donald Trump sent a letter to Iran's Supreme Leader Ali Khamenei, seeking a new deal with Tehran to restrain its rapidly advancing nuclear program and replace the agreement he withdrew America from in his first term in office.

Iranian state media immediately picked up on Trump's acknowledgment, given in portions of a Fox Business News interview aired on Friday, though there was no confirmation from Khamenei's office that any letter had been received. The interview is expected to air in full on Sunday.

EU chiefs on Friday briefed several NATO partners -- including Britain and Turkey -- about the outcome of a meeting on defense of the bloc's leaders in Brussels a day earlier.

"Our cooperation with likeminded NATO partners is vital for international security. For Ukraine. For stepping up our joint efforts on defense," Antonio Costa, who heads the body representing the European Union's 27 states, said in a post on X.

Chinese Foreign Minister Wang Yi said China will continue to retaliate for the United States' "arbitrary tariffs" and accused Washington of "meeting good with evil" in a press conference Friday on the sidelines of the country's annual parliamentary session.

Wang said China's efforts to help the U.S. contain its fentanyl crisis have been met with punitive tariffs, which are straining their ties.

The discovery of a huge unexploded World War II-era bomb near the tracks severed Paris' high-speed rail links with London and Brussels on Friday, dashing travelers' weekend getaway plans and causing cascading disruptions to scores of other intercity and commuter trains in and out of the French capital's Gare du Nord, the busiest railway station in France.

Eurostar, operator of sleek high-speed trains between the U.K. and the continent, announced the cancellation of all its services to and from Gare du Nord, its Paris hub, and the British and Belgian capitals.

Turkish security forces have killed 26 Kurdish militants in the past week, the Turkish defense ministry said Thursday, even as the militants' imprisoned leader called on his group to disband and his fighters declared a ceasefire.

A defense ministry statement said the militants were killed in military operations in areas including the north of Iraq and Syria. It did not provide details on the circumstances of the clashes.

Russia targeted Ukraine's energy infrastructure in a large-scale missile and drone bombardment during the night, officials said Friday, hours after Ukrainian President Volodymyr Zelensky said talks with the U.S. on ending the 3-year war will take place next week.

Ukraine came under a "massive missile and drone" attack, Energy Minister Herman Halushchenko wrote on Facebook. At least 10 people, including a child, were injured, authorities said.