Russian President Vladimir Putin's "special military operation” into Ukraine began on Feb. 24, with troops crossing the border from Belarus and Russia. Moscow's forces have since been met with “stiff resistance” from Ukrainians, according to U.S. officials.
Russian forces retreated last week from the Kyiv suburbs, leaving behind a trail of destruction. After graphic images emerged of civilians lying dead in the streets of Bucha, U.S. and European officials accused Russian troops of committing war crimes.
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 19, 2022, 2:32 PM EDT
Kremlin confirms it used hypersonic missiles in Ukraine
The Kremlin confirmed Saturday that it used hypersonic missiles for the first time since invading Ukraine.
Russia used the Kinzhal aviation missile system, with hypersonic aeroballistic missiles, on the village of Delyatyn in Ukraine on Friday, according to Igor Konashenkov, a spokesman for the Russian Defense Ministry.
"On March 18, the Kinzhal aerial missile system equipped with hypersonic aero-ballistic missiles destroyed a large underground missile and air ammunition depot of the Ukrainian Armed Forces in the settlement of Deliatyn in the Ivano-Frankivsk region," Konashenkov said at a briefing on Saturday.
The Russian military claims it is capable of hitting targets at a range of more than 2,000 kilometers.
Mar 19, 2022, 2:23 PM EDT
Ukraine says it has detained at least 562 Russian prisoners of war
At least 562 prisoners of war are being held in Ukraine, Irina Vereshchuk, the head of the country's Ministry of Reintegration, a ministry established in 2016 to manage occupied Ukrainian territories, said in an interview with Ukrainian news service TSN on Saturday.
Vereshchuk said they are being treated according to international humanitarian law.
Mar 19, 2022, 1:12 PM EDT
At least 30 killed in strike on Ukrainian military base: witness
At least 30 people were killed in a strike on a Ukrainian military barrack south of Mykolaiv on Friday, according to a witness.
A civilian working with the Ukrainian military told ABC News that more than 30 people were killed in the attack– believed to be in retaliation to damage done to the Russian controlled facility in Kherson.
Ukranien soldiers search for bodies in the debris at the military school hit by Russian rockets the day before, in Mykolaiv, southern Ukraine, March 19, 2022.
Bulent Kilic/AFP via Getty Images
On Friday, Mykolaiv's mayor said that "dozens" of troops were killed in the strike.
Mykolaiv's governor said the rescue operation is ongoing and no official figures on casualties will be released until it's over.
-ABC News' Dada Jovanovic
Mar 19, 2022, 11:25 AM EDT
UNICEF calls for strengthened measures to protect children fleeing Ukraine from human trafficking, exploitation
The United Nations Children's fund warned Saturday that children fleeing the war in Ukraine are at an increased risk of human trafficking and exploitation.
"Traffickers often seek to exploit the chaos of large scale population movements, and with more than 1.5 million children having fled Ukraine as refugees since [Feb.24], and countless others displaced by violence inside the country, the threat facing children is real and growing," UNICEF said.
According to an analysis conducted by UNICEF and the Inter-Agency Coordination Group against Trafficking, 28% of identified victims of trafficking globally are children.
A police officer pushes a refugee's pram and holds her child's hand as he guides them towards transport after fleeing from Ukraine to Romania, following Russia's invasion of Ukraine, at the border crossing in Siret, Romania, March 19, 2022.
Clodagh Kilcoyne/Reuters
"In the context of Ukraine, UNICEF child protection experts believe that children would likely account for an even higher proportion of potential trafficking victims given that children and women represent nearly all of the refugees who have fled the country so far," UNICEF said.
According to UNICEF, more than 500 unaccompanied children were identified crossing the Ukrainian border into Romania between Feb. 24 and March 17. It also estimates that the true number of separated children who have fled Ukraine is likely much higher.
"Displaced children are extremely vulnerable to being separated from their families, exploited, and trafficked. They need governments in the region to step up and put measures in place to keep them safe," said Afshan Khan, UNICEF’s regional director for Europe and Central Asia.
Khan said children need to be screened for their vulnerability as they cross the border into another country.
"UNICEF is calling on governments to improve cross-border collaboration and knowledge exchange between and among border control, law enforcement and child protection authorities and to quickly identify separated children, implement family tracing and reunification procedures for children deprived of parental care," UNICEF said.
UNICEF also said additional screening for protection risks should be implemented in shelters, large urban train stations and other locations where refugees gather or pass through.