A Russian air strike has hit near Kyiv's southern rail station where thousands of women and children are being evacuated, Ukraine's state-run railway company said.
The firm Ukrzaliznytsya said the station building suffered minor damage on Wednesday and the number of any casualties was not yet known.
It comes as attacks on densely populated cities intensify at the end of the first week of war in Ukraine.
Meanwhile a senior US diplomat claimed Russia has used cluster munitions and vacuum bombs during its invasion in breach of the Geneva Convention.
Linda Thomas-Greenfield, the US envoy to the United Nations, said Vladimir Putin’s forces were prepared to use “exceptionally lethal weaponry” to achieve their military objectives.
Fighting between Ukrainian and Russian troops has intensified in key cities on Wednesday as Vladimir Putin’s forces closed in on Kyiv.
A fresh wave of artillery strikes hit the city of Kharkiv as Ukrainian authorities warned that more than 2,000 civilians had died since Russia launched an invasion six days ago.
"Children, women and defence forces are losing their lives every hour," the country’s emergency services said in a statement.
Meanwhile, Kyiv mayor Vitali Klitschko said that Russia was gathering its forces “closer and closer” to the capital – despite the stalling of a large military convoy some 20 miles from the city.
Russia said it had sent delegates for a second round of peace talks in Belarus – though Ukrainian President Volodymyr Zelenskiy has urged Moscow to stop bombing if it wants to negotiate.
