Zelenskyy: 'Doctors are currently fighting to save lives after a Russian attack on Kramatorsk. As of now, it is known that 30 people have died, and unfortunately, the number may increase. A Russian bomb struck two minibuses. Some of the victims have not yet been identified due to the severity of their injuries...In total, 18 other people were injured in the attack. Residential buildings and cars were also damaged.This attack will not go unanswered'