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.
At least eight Palestinians, most of them children, were killed and more than a dozen others were wounded in central Gaza on Sunday, local officials said, in an Israeli missile strike which the military said missed its intended target.
North Korean leader Kim Jong Un told Russia's top diplomat his country was ready to "unconditionally support" Moscow's every effort to resolve the conflict in Ukraine, state media reported on Sunday, as the two countries held high-level strategic talks.
A preliminary report depicted confusion in the cockpit shortly before an Air India jetliner crashed, killing 260 people last month, after the plane's engine fuel cutoff switches almost simultaneously flipped, starving the engines of fuel.
US President Donald Trump defended the state and federal response to deadly flash flooding in Texas on Friday as he visited the stricken Hill Country region, where at least 120 people, including dozens of children, perished a week ago.