Dozens of protesters took over a building at Columbia University in New York early Tuesday, barricading the entrances and unfurling a Palestinian flag out of a window in the latest escalation of demonstrations against the Israel-Hamas war that have spread to college campuses nationwide.

Video footage showed protesters on Columbia's Manhattan campus locking arms in front of Hamilton Hall early Tuesday and carrying furniture and metal barricades to the building, one of several that was occupied during a 1968 civil rights and anti-Vietnam War protest on the campus. Posts on an Instagram page for protest organizers shortly after midnight urged people to protect the encampment and join them at Hamilton Hall.

French police removed dozens of students from the Sorbonne university after pro-Palestinian protesters occupied the main courtyard of the elite institution in Paris on Monday.

About 50 protesters set up tents at midday Monday at the Sorbonne university courtyard in support of Palestinians, echoing similar encampments and solidarity demonstrations across the United States.

Chinese President Xi Jinping will visit France, Serbia and Hungary next week as Beijing appears to seek a larger role in the conflict between Russia and Ukraine that has upended global political and economic security.

The visit by Xi, China's president and head of the ruling Communist Party, is his first to Europe in five years and will "inject new momentum to the peaceful development of the world," Foreign Ministry spokesperson Lin Jian said at a daily briefing on Monday.

Protests are roiling college campuses across the U.S. as upcoming graduation ceremonies are threatened by disruptive demonstrators, with students and others sparring over the war in Gaza and its mounting death toll.

Many campuses were largely quiet over the weekend as demonstrators stayed by tents erected as protest headquarters, although a few colleges saw forced removals and arrests. Many students are demanding their universities cut financial ties with Israel over the large-scale operation in Gaza it says was launched to stamp out the militant Palestinian group Hamas.

President Joe Biden is out to win votes by scoring some laughs at the expense of Donald Trump, unleashing mockery with the goal of getting under the former president's thin skin and reminding the country of his blunders.

Like a comic honing his routine, the Democratic president has been testing and expanding his jokes over the past few weeks. It started with jabs about his Republican opponent's financial problems, and now Biden regularly pokes fun at Trump's coiffed hair, his pampered upbringing and his attempt to make a few extra bucks by selling a special edition of the Bible.

U.S. intelligence officials have determined that Russian President Vladimir Putin likely didn't order the death of imprisoned opposition leader Alexei Navalny in February, according to an official familiar with the determination.

While U.S. officials believe Putin was ultimately responsible for the death of Navalny, who endured brutal conditions during his confinement, the intelligence community has found "no smoking gun" that Putin was aware of the timing of Navalny's death — which came soon before the Russian president's reelection — or directly ordered it, according to the official.

Spanish Prime Minister Pedro Sánchez said Monday he will continue in office "even with more strength" after days of reflection.

Sánchez shocked the country on Wednesday, announcing he was taking five days off to think about his future after a court opened preliminary proceedings against his wife on corruption allegations.

From New York to California, students protesting the Israel-Hamas war slept in tents at college campuses, as some universities moved to shut down encampments and arrested dozens of demonstrators after reports of alleged antisemitic activity.

With the death toll mounting in the war in Gaza, protesters nationwide are demanding schools cut financial ties to Israel and divest from companies they say enable the conflict. Some Jewish students say the protests have veered into antisemitism and made them afraid to set foot on campus.

Students protesting the Israel-Hamas war at at universities across U.S., some of whom have clashed with police in riot gear, dug in Saturday and vowed to keep their demonstrations going, while several school faculties condemned university presidents who have called in law enforcement to remove protesters.

As Columbia University continues negotiations with those at a pro-Palestinian student encampment on the New York school's campus, the university's senate passed a resolution Friday that created a task force to examine the administration's leadership, which last week called in police in an attempt to clear the protest, resulting in scuffles and more than 100 arrests.

Student protests over the Israel-Hamas war have popped up on an increasing number of college campuses following last week's arrest of more than 100 demonstrators at Columbia University.

The students are calling for universities to separate themselves from any companies that are advancing Israel's military efforts in Gaza — and in some cases from Israel itself.