Ukrainian President Volodymyr Zelensky has rejected any deal to give up the Donbas region for a ceasefire, warning it would invite further Russian attacks. His statement came before a planned Alaska meeting between US President Donald Trump and Russia’s Vladimir Putin, BBC reported.

Trump hinted a peace deal might involve territorial swaps, including Russia’s demand for parts of Donbas. Russia holds much of the region and is advancing militarily.

Zelensky stressed Ukraine’s constitution requires a referendum before any land is ceded and voiced frustration at being excluded from the talks, calling the summit a win for Putin. He will join a virtual meeting with Western leaders urging Trump not to concede to Russian pressure, according to BBC.