Kramatorsk attack sparks global outrage.

Ukrainian President Volodymyr Zelenskyy called Friday's deadly missile attack on the Kramatorsk train station in eastern Ukraine "another war crime of Russia."

"All the world's leading powers have already condemned Russia's attack on Kramatorsk," Zelenskyy said during his latest national address Friday. "We expect a firm, global response to this war crime."

The president called for the missile strike, which killed at least 50, to be among the charges in a war crimes tribunal against Russia.

"All the efforts of the world will be aimed to establish every minute: who did what, who gave orders. Where did the rocket come from, who was carrying it, who gave the order and how the strike was coordinated," Zelenskyy said. "Responsibility is inevitable."