What is white phosphorus, and is Russia using it in Ukraine?
White phosphorus can ignite fast-burning fires and inflict extreme burns, making it particularly hazardous for civilians in war zones.
More than half of Ukraine's kids displaced by Russia's war, U.N. says
"This is a grim milestone that could have lasting consequences for generations to come," said the executive director of UNICEF.
Russia-Ukraine war: What you need to know now
Almost a month after Vladimir Putin ordered his troops to invade, here are some of the latest major developments in the ongoing war.
Journalist reportedly kidnapped and tortured by Russian troops in Ukraine
"Nikita has given us a chilling testimony that confirms the intensity of the war crimes perpetrated by the Russian army against journalists," the group Reporters Without Borders says.
"You are being lied to": Russian state TV staffer stages bold protest
An employee of a state-run TV channel burst onto the set of its nightly news broadcast with a sign reading: "Stop the war. Don't believe propaganda."
Over 40,000 Syrians reportedly register to fight for Russia in Ukraine
A notice was sent out to members of a militia that has been sanctioned by the U.S. for serving as an intermediary between the Assad regime and ISIS, the Syrian Observatory for Human Rights said.
Nervous Kyiv residents venture out to stock up after weekend lockdown
Exhausted and anxious after a weekend of Russian shelling, Ukrainians emerge from their shelters to line up for dwindling emergency supplies.
Kyiv residents continue sheltering underground on third day of Russian invasion
One woman told CBS News she is staying in a metro station with her mother and her dog as fighting continues near the capitol city.
Some LGBTQ Ukrainians fear abuse if Russia stays: "We will fight"
Russia "won't allow us to exist peacefully and to fight for our rights as we are able to do that in Ukraine right now," an 18-year-old law student said.
Ukrainians expect "losses" as Europe laments Putin's "act of war"
"The Kremlin has taken another step towards the revival of the Soviet Union," Ukraine's defense chief says, predicting "difficult challenges ahead."
Putin orders Russian forces into Ukraine's breakaway regions
The U.S. warned last week that recognizing the self-declared "People's Republics" of Donetsk and Luhansk would violate international law and would "necessitate a swift and firm response" from America and its allies.
Biden-Putin summit on the table — if Russia doesn't invade Ukraine
Kremlin confirms interest in a possible presidential summit as the U.S. warns Putin's forces are "continuing preparations for a full-scale assault."
Ukraine marks anniversary of deadly uprising as threat of Russian invasion looms
"I think that the Ukrainian people has made its decision, and I don't think that Russia is in a position to overturn it," one protestor said at a memorial service Sunday.
Ukraine's president urges sanctions against Russia before possible invasion, not after
"You're telling me that it's 100% that the war will start in a couple of days. Then what [are you] waiting for?" said President Volodymyr Zelensky.
Russian-backed separatist leaders declare full military mobilization
Tensions continued to mount in the east of Ukraine on Saturday after reports of increased shelling in the region overnight.