Ukrainian forces are close to cutting off thousands of Russian troops in a major military embarrassment for Putin's generals. Russia's army is struggling to contain the attack, with Ukraine seizing territory and bridges. Russian soldiers are at risk of being encircled and cut off from the rest of their army.
Key Points
Ukrainian forces close to cutting off Russian troops
Russia's army struggling to contain the attack
Russian soldiers at risk of being encircled
Civilians fleeing as Russian troops advance on strategic city