Russian forces are continuing their attempted push through Ukraine from multiple directions, while Ukrainians, led by President Volodymyr Zelenskyy, are putting up "stiff resistance," according to U.S. officials.
The attack began Feb. 24, when Russian President Vladimir Putin announced a "special military operation."
Russian forces moving from neighboring Belarus toward Ukraine's capital, Kyiv, have advanced closer to the city center in recent days despite the resistance, coming within about 9 miles as of Friday.
Russia has been met by sanctions from the United States, Canada and countries throughout Europe, targeting the Russian economy as well as Putin himself.
A look at the two leaders at the center of the war in Ukraine and how they both rose to power, the difference in their leadership and what led to this moment in history.
Here's how the news is developing. All times Eastern.
Mar 06, 2022, 5:24 AM EST
1.5 million have fled Ukraine in 10 days: UN
More than 1.5 million people have fled Ukraine since the Russian invasion began, the head of the U.N. Refugee Agency said on Sunday.
People wait to board an evacuation train at Kyiv central train station on March 5, 2022.
Dimitar Dilkoff/AFP via Getty Images
"More than 1.5 million refugees from Ukraine have crossed into neighbouring countries in 10 days -- the fastest growing refugee crisis in Europe since World War II," Filippo Grandi, the U.N. high commissioner for refugees, said on Twitter.
Mar 06, 2022, 4:49 AM EST
Mariupol civilians to evacuate under cease-fire
An official in Mariupol, a Ukrainian city besieged by the Russians, said a cease-fire on Sunday will allow citizens to evacuate.
The temporary cease-fire was scheduled to begin at 10 a.m. local time, with an evacuation starting two hours later, Pavlo Kyrylenko, governor of Donetsk Oblast, said on Facebook.
A similar plan had been announced for Saturday, but Russian shells continued to fall throughout the day.
Mar 06, 2022, 3:35 AM EST
WHO confirms 'several' attacks on Ukrainian health care facilities
The World Health Organization said on Sunday it had confirmed "several" attacks on health care facilities in Ukraine.
The attacks caused "multiple deaths and injuries," WHO Director-General Tedros Adhanom Ghebreyesus said on Twitter.
"Additional reports are being investigated," he said. "Attacks on healthcare facilities or workers breach medical neutrality and are violations of international humanitarian law."
Ukraine’s military on Sunday said it was "fighting fierce battles to maintain certain borders," including defending Chernihiv and Mariupol, cities targeted by Russian shelling.
"The enemy, suffering losses, makes constant attempts to avoid direct fire contact with our troops," military officials said, according to an official translation posted on Facebook.
A school building damaged in the March 3 shelling of the city of Chernihiv, Ukraine, March 4, 2022.
Dimitar Dilkoff/AFP via Getty Images
An operation is underway to defend Chernihiv, a city about 100 miles north of Kyiv, the capital, the update said. In the east, the Ukrainian military’s "main efforts are focused on defending the city of Mariupol and inflicting fire damage on the overwhelming forces of the enemy."
People lie on the floor of a hospital during shelling by Russian forces in Mariupol, Ukraine, March 4, 2022.
Evgeniy Maloletka/AP
Ukraine’s military claimed on Sunday to have destroyed 88 Russian aircraft and helicopters.
"Some enemy pilots who catapulted and survived were found by Ukrainian soldiers," the update said. "They have received medical treatment and are already testifying about the Putin regime's crimes against humanity."