A Ukrainian regional governor says the country’s soldiers have killed 200 Russian airborne troops in an assault that toppled a base in Ukraine’s occupied east.

Serhiy Haidai, the governor of Ukraine’s Luhansk administrative district, said on Friday in a Telegram post that Ukrainian troops had successfully attacked the Russian base set up in a hotel in the occupied city of Kadiivka. Haidai’s claim to victory comes as Russia’s advance in Ukraine’s eastern regions has reportedly stalled as the conflict reaches six months.