Hundreds of drones targeting Moscow and its surrounding region killed at least two people and damaged a major refinery on the final day of Russia's parliamentary elections, the authorities said Sunday.

The United States warned Saturday that hostilities between Saudi Arabia and Iran-backed Houthis could "escalate rapidly" after a missile attack targeted Riyadh for the first time since the Yemen conflict resumed.

U.S. President Donald Trump cut short a weekend at Camp David to return unexpectedly to the White House, as tensions rose in the Middle East.

Turkey has revoked the license of Iran's Bank Mellat, a semi-private financial entity that has been subject to Western sanctions for years, the official gazette said early Saturday.

Denmark's foreign minister said Saturday that a "binding" agreement on Greenland's security with the U.S. "strengthens security" in the Arctic, ahead of its expected signing in the coming days.

A powerful bomb exploded Friday at a mosque near a building housing police offices in northwestern Pakistan, killing at least 15 people and wounding 56 others, police and rescue officials said. The attack came as violence has surged in the region with security forces targeting militants.

The bombing occurred in Kohat, a district in Khyber Pakhtunkhwa province bordering Afghanistan, when an attacker apparently rammed an explosives-laden vehicle into the mosque, said Zulfiqar Hameed, the provincial police chief.

The world is deeply divided and the U.N.'s most powerful body is paralyzed when it comes to ending conflicts. But there's a way forward. So says the United Nations' top official.

On his way out of office at year's end after nearly a decade, U.N. Secretary-General António Guterres — known for doom-and-gloom speeches about the state of the planet — said Thursday he finds hope and possibility in the coming years. But that, he says, is only if the world's governments can finally cooperate on curtailing conflict, upending inequality and grappling with the arriving juggernaut of artificial intelligence.

Ukrainian President Volodymyr Zelensky welcomed leaders and representatives from seven regional countries for talks on deepening cooperation on Friday, as overnight Russian strikes in multiple regions sparked fires and caused several deaths and injuries.

The inaugural summit of the so-called "Carpathian Eight" brings together Ukraine, Romania, Serbia, Poland, Slovakia, the Czech Republic, Austria and Hungary, with the European Union also involved.

Russians on Friday began three days of voting in the country's first wartime parliamentary election, which features virtually no opposition and is all but certain to secure the Kremlin's political dominance.

Authorities spread the election over the weekend in a bid to boost turnout among the 111 million eligible voters and even allowed electronic balloting. Polls opened Friday and will close Sunday.

The Trump administration has approved visas for top Iranian officials, including the president and foreign minister, to attend next week's U.N. General Assembly high-level meeting in New York even as the two countries are locked in a stalemated war.

The State Department said Thursday that it had approved visas for Iran's "core delegation," along with essential staffers to participate in the U.N. meetings. The core delegation includes President Masoud Pezeshkian and Foreign Minister Abbas Araghchi, according to U.S. officials, who spoke on condition of anonymity due to visa privacy laws.