Ukraine confirms Russia's surprise attack through sewers. Avdiivka has been on the front since 2014, and is only about 15 kilometers from Donetsk as the crow flies.
Since October 20, the Ukrainian counteroffensive has intensified attacks on the Kremlin chief Vladimir Putin. Russia has lost 228 armored fighting vehicles and 143 tanks in the battle at Av diivka alone. If it really happened, probably the first advance was not the first underground operation in the Ukraine war. With the underground attack, the pocket around Avdiiva is slowly closing.