After about two hours in Ukraine, Biden’s motorcade returned to Slovakia.
The US First Lady met with US troops and Ukrainian refugees on a tour of Eastern Europe.
Earlier Sunday, she met with volunteers helping refugees in Slovakia and visited another school where children were making craft projects for Mother’s Day.
“The hearts of the American people are with the mothers of Ukraine,” Biden told the crowd.
The classroom was filled with families whose husbands and fathers stayed behind to fight in Ukraine.
A woman traveling with Biden told a pool reporter that the first lady’s visit was encouraging.
“It means support for us,” the woman said. “We are very tired. It is an emotional support for us. “
Several American officials have visited Ukraine in recent weeks, including Secretary of State Antony Blinken, Defense Secretary Lloyd Austin and House Speaker Nancy Pelosi.
Canadian Prime Minister Justin Trudeau met with Zelensky in Kyiv on Sunday, and U2 stars Bono and the Edge, They performed inside the capital’s railway station.
But Ukraine saw more bloodshed on Sunday after a bomb attack on a school where civilians were sheltering in the eastern village of Bilohoryvka.
Around 60 people are suspected to have died, a regional official said.
“We’ve long called out the Russians for committing war crimes, and this contributes to that,” Linda Thomas-Greenfield, the US ambassador to the UN, told CNN of the bombing. “We will continue to work with Ukrainian prosecutors and others to document evidence of their war crimes so that they are held accountable. This will add to the long list we already have.”