At least two people have been killed in Russian strikes on Ukraine on Saturday, as rescue operations continue in Kryvyi Rih following Friday's deadly attack on a shopping centre.

In Kyiv, one person died after a fire broke out at a building in the capital's Darnytskyi district, according to the Kyiv City Military Administration, which had issued an air raid alert shortly before.

Oleksandr Pertsovskyi, the head of Ukrainian Railways, a state-run rail operator, said Russian forces had targeted a railway facility with ballistic missiles and that the victim was a foreman at the site.

"The Odesa railway is also under attack," he added in a social media post on Saturday morning.

A man was also killed in a drone strike on Kushuhum in the southeastern Ukrainian region of Zaporizhzhia, per Ivan Fedorov, the regional governor. Four others were injured in the attack, he said.