Iran's threatened retaliatory strike on Israel over the assassination of Hamas official Ismail Haniyeh drew major world powers on Tuesday into a high-wire act of diplomacy.

Halting or limiting an Iranian strike in some eyes could bolster a monthslong effort to reach a cease-fire in a war that's devastated the Gaza Strip and killed nearly 40,000 Palestinians, according to the territory's health ministry. It could also free the Israeli hostages who remain captive there since Hamas' Oct. 7 attack on southern Israel.

Donald Trump recounted his assassination attempt in vivid detail and promised the largest deportation in U.S. history during a high-profile return to the social media platform formerly known as Twitter — a conversation that was plagued by technical glitches.

"If I had not turned my head, I would not be talking to you right now — as much as I like you," Trump told X's owner Elon Musk.

Ukraine said Tuesday it was not interested in "taking over" territory it had captured during its cross-border incursion into Russia's Kursk region, calling Ukrainian operations there "absolutely legitimate".

"Ukraine is not interested in taking over the territory of the Kursk region ... These Ukrainian actions are absolutely legitimate," Ukrainian foreign ministry spokesperson Georgiy Tykhy told a press conference.

The FBI is investigating allegations that sensitive documents from Donald Trump's presidential campaign were stolen in a cyber intrusion, as well as attempts to gain access to Vice President Kamala Harris' campaign, days after the Trump campaign declared it had been hacked by Iran.

The FBI released a brief statement on the Trump matter reading, "We can confirm the FBI is investigating this matter."

Iran on Tuesday rejected Western calls to stand down its threat to retaliate against Israel for the killing of Hamas political leader Ismail Haniyeh in Tehran late last month.

"The declaration by France, Germany and Britain, which raised no objection to the international crimes of the Zionist regime, brazenly asks Iran to take no deterrent action against a regime which has violated its sovereignty and territorial integrity," foreign ministry spokesman Nasser Kanani said in a statement.

German Chancellor Olaf Scholz on Monday expressed "great concern" about the "spiral of violence" in the Middle East in a phone call with Iranian President Masoud Pezeshkian, his spokesman Wolfgang Buechner said in a statement.

Scholz "appealed to President Pezeshkian to do everything possible to prevent a further military escalation", expressed "great concern about the danger of a regional conflagration in the Middle East" and said "the spiral of violence in the Middle East must be broken now".

A man has been arrested after an 11-year-old girl and a 34-year-old woman were stabbed in central London, London's Metropolitan Police said Monday.

The attack occurred in Leicester Square, a magnet for tourists with its shops, theaters and cinemas. The square and surrounding area have an estimated 2.5 million visitors every week.

An official in the Kursk border region of Russia on Monday urged more residents to evacuate due to the "very tense situation" in the area, where Russian forces are still scrambling to respond to a surprise Ukrainian attack after almost a week of fierce fighting.

Russia's emergency authorities say more than 76,000 people have fled their homes in areas of Kursk, where Ukrainian troops and armor poured across the border on Aug. 6, reportedly driving as deep as 30 kilometers (19 miles) into Russia and sowing alarm.

Iranian President Masoud Pezeshkian has proposed former nuclear negotiator Abbas Araghchi as the country's new foreign minister and also sought to appoint a woman as roads and housing minister. If approved, she would be Iran's first female minister in more than a decade.

Parliament Speaker Mohammad Bagher Qalibaf read out the list of proposed ministers to lawmakers. The hard-line-dominated chamber will have two weeks to review qualifications and give a vote of confidence to the proposed ministers.

At the top of his first speech as her running mate, Minnesota Gov. Tim Walz turned to Vice President Kamala Harris and declared, "Thank you for bringing back the joy." The next day, Harris took the theme a step further, branding the Democratic ticket "joyful warriors."

Contrast that with former President Donald Trump, who opened a news conference at his Mar-a-Lago club in Florida a few days later by saying, "We have a lot of bad things coming up," and predicting the U.S. could fall into an economic depression unseen since the dark days of 1929 or even another world war.