Iskander missiles were launched from Belarus to Ukraine around 5 p.m. (1500 GMT), an adviser to Ukraine's interior minister said.
Ukrainian and Russian officials are due to meet for talks at a venue on the Belarusian border with Ukraine, President Volodymyr Zelensky's office said on Sunday.
Anton Herashchenko, the adviser to Ukraine's interior minister, had earlier said that Iskander missiles were launched at Ukraine from Belarus at around 5 p.m. local time (1500 GMT).