The United Nations Security Council on Monday will hold a meeting to discuss the deteriorating humanitarian situation in Ukraine after more than 1.7 million Ukrainians have so far crossed into central Europe.
The meeting was expected to start at 2000GMT, three diplomats said.
The United Nations has been at the forefront of diplomatic efforts urging an end to Russia's invasion of Ukraine.
Russia has called the campaign it launched on February 24 a "special military operation".
France and Mexico last week worked on a resolution to the UN Security Council to address the humanitarian impact, but it was unclear if it would be formally tabled on Monday's meeting.
A total of 1,735,068 civilians - mostly women and children, as men stayed home to fight - have crossed the border into central Europe, the UNHCR said.
Poland, which has the largest Ukrainian community in the region - has received more than 1 million Ukrainian refugees, with the milestone passed late on Sunday.
President-elect Donald Trump threatened to reassert US control over the Panama Canal on Sunday, accusing Panama of charging excessive rates to use the Central American passage and drawing a sharp rebuke from Panamanian President Jose Raul Mulino.
Two weeks after seizing power in a sweeping offensive, Syria's new leader Ahmed al-Sharaa said weapons in the country, including those held by Kurdish-led forces, would come under state control.
Police arrested a man who reportedly set a woman on fire while she appeared to be asleep on a New York City subway train on Sunday morning, killing her.
A bridge connecting two states in Brazil's northern and northeastern regions collapsed on Sunday as vehicles were crossing, killing at least one person and spilling sulfuric acid into the Tocantins River.
Israeli military strikes across the Gaza Strip killed at least 17 Palestinians, eight of them at a school sheltering displaced families in Gaza City, medics said, as the Israeli military ordered the evacuation of a hospital in the north.