"At the moment, the enemy has tactical success" in the fight for Vovchansk, the General Staff said in a statement on social media. In recent days, Vovchansk has become a key target of Russia’s new offensive, as Russia launched an attempt on May 10 to break through in Kharkiv Oblast. The General Staff said it is mounting a defensive operation to halt Russian advances that have breached Ukraine's defenses. Additional reserves are being deployed to the area in order to "stabilize the situation.""Our defenders are conducting defensive operations, inflicting fire damage on the enemy, widely using unmanned systems for reconnaissance and pinpoint strikes to inflict maximum losses."Ukraine's General Staff said that over 100 Russian soldiers have been killed throughout the day on May 12 amid heavy fighting for the city.