Reinforced concrete shelters will be installed across the Kursk region, local Russian authorities announced Thursday as Ukraine keeps up its daring attack on Moscow’s territory.

“Today we began to install reinforced concrete shelters in Kursk. On my instructions, the Kursk city administration identified key points for placing concrete modular shelters in crowded places,” Aleksey Smirnov, Kursk’s acting governor, said in a statement.

Ukraine’s surprise cross-border incursion earlier this month caught the Russians on the hop, and Kyiv’s forces have expanded their offensive, capturing more towns and territory with little resistance.