Russia has not given up its plan to seize Kyiv, said Vitali Klitschko, Kyiv Mayor, APA reports citing CNN.
it is difficult to ensure the safety of residents returning to their homes, the mayor said.
Vitali Klitschko also expressed concern over Russia's possible use of nuclear weapons.
He warned Kyiv residents returning home to be careful.
"As long as there is a war in Ukraine, we cannot guarantee any Ukrainian," Klitschko said.
Russian Federation could attack the city at any time, he said.
"Security is a key issue now. Of course, we are worried, but our army is protecting us. However, the risk still exists and we cannot survive without our partners, the United States and European countries, "he added.