Ukrainian President Volodymyr Zelensky said he would reject any proposal by Russia to withdraw from the Donbas region to reach a ceasefire

The president of Ukraine, who controls part of the Donbas region, has warned that this situation could serve as a springboard for future invasions.

Zelensky made the remarks ahead of a summit between US President Donald Trump and his Russian counterpart, Vladimir Putin, in Alaska next Friday.

Trump said any peace deal would "include some territory swaps," which is believed to be Putin's demand that Ukraine cede some of the Donbass region it controls.

Meanwhile, Russian troops launched a surprise attack near the eastern town of Dobropilia, advancing 10 kilometers in a short period.