Vast crowds of students surged onto Istanbul's streets Monday in the latest protest over the arrest and jailing of Istanbul's opposition mayor that has sparked Turkey's worst unrest in years.

The demonstrations began after Ekrem Imamoglu's March 19 arrest and have since spread to at least 55 of Turkey's 81 provinces, sparking clashes with riot police and drawing international condemnation.

Police have arrested more than 1,130 people over the past six days, including 43 on Monday night, the interior minister said. Among them are journalists, including an AFP photographer.

Doctors Without Borders (MSF) denounced on Monday the "extremely precarious" situation of Palestinians displaced by the ongoing Israeli military operation in the occupied West Bank.

According to the United Nations, some 40,000 residents have been displaced since January 21, when the Israeli army launched an operation targeting Palestinian armed groups in the north of the territory.

The West Bank, occupied by Israel since 1967, is home to about three million Palestinians as well as nearly 500,000 Israelis living in settlements that are illegal under international law.

A meeting between Russian and US officials on a partial ceasefire in Ukraine ended after 12 hours of negotiations in Saudi Arabia, Russian state media said, as both sides in the conflict reported a wave of fresh attacks.

While the talks took place at a luxury hotel in Riyadh, nearly 90 people including 17 children were wounded in a missile attack Monday on Sumy in northeastern Ukraine, President Volodymyr Zelensky said.

The leaders of 22 Indigenous peoples from five continents held prayers for nature in Chile on Sunday at the end of a 46-day pilgrimage around the world.

The "Indigenous sages" carried out an ancestral ceremony of the Anasazi people, who lived in the Chaco Canyon before European settlement in what was to become the US state of New Mexico.

It was a ritual that, for the first time, brought together peoples from all over the planet -- travelling together on a journey that began in Italy and passed through India, Australia, and Zimbabwe before concluding in Chile.

An Israeli air strike on Sunday killed a member of Hamas's political bureau as he underwent treatment in hospital, a source in the Islamist movement said, after Israel confirmed it targeted "a key terrorist".

"The Israeli army assassinated Hamas political bureau member Ismail Barhoum," the Hamas source said, requesting anonymity to speak more freely.

"Warplanes bombed the operating room at Nasser Hospital in Khan Yunis, where Barhoum was receiving treatment after sustaining critical injuries in an air strike targeting his home in Khan Yunis at dawn last Tuesday."

Israel's cabinet passed a vote of no confidence on Sunday in the attorney general, the justice minister said, moving against a vocal critic of Prime Minister Benjamin Netanyahu and deepening a political rift in the country.

The vote against Attorney General Gali Baharav-Miara is the first step in a process to dismiss her, and came two days after the government fired the head of the country's internal security agency.

Three civilians were killed Sunday in an artillery attack by paramilitaries on Omdurman, part of Greater Khartoum, a medical source told AFP, two days after the army recaptured the capital's presidential palace in a major symbolic victory.

Eyewitnesses in the area said the bombardments by the Rapid Support Forces were some of the heaviest in recent months.

Since April 2023, the RSF has been fighting Sudan's regular army in a war that has killed tens of thousands, uprooted over 12 million and created the world's largest hunger and displacement crises.

Israel's military pressed ground operations across the Gaza Strip on Sunday, encircling part of Rafah city near Egypt almost a week into a renewed assault on the Palestinian territory.

Deployment of Israeli troops in parts of Gaza, despite calls to revive a January truce with Hamas militants, comes alongside a deadly flare-up in Lebanon and missiles fired from Yemen.

The health ministry in Hamas-run Gaza said on Sunday that the war triggered by Hamas's October 7, 2023 attack on Israel had killed at least 50,021 people in the territory.

In a Baghdad arena, a crowd cheers to the rhythm of drums, not for a football match but for a fiery centuries-old game enjoyed by Iraqis during Ramadan called "mheibes".

"It's a heritage game, the game of our ancestors, which unites all Iraqis," said Jassem al-Aswad, a longtime mheibes champion in his early seventies and now president of the game's national federation.

The game involves members of one team hiding a ring -- "mehbis" in Arabic -- and the captain of the opposing team trying to guess who has it in the palm of his hand.

Palestinian president Mahmud Abbas's Fatah movement called on its Islamist rivals Hamas on Saturday to relinquish power in order to safeguard the "existence" of Palestinians in the Gaza Strip.

"Hamas must show compassion for Gaza, its children, women and men," Fatah spokesman Monther al-Hayek said in a message sent to AFP from Gaza.

He called on Hamas to "step aside from governing and fully recognise that the battle ahead will lead to the end of Palestinians' existence" if it remains in power in Gaza.