KYIV, Ukraine (AP) — Civilian evacuations are moving forward in patches of battle-scarred eastern Ukraine a day after a missile strike killed at least 52 people at a train station where thousands were waiting to leave before an expected Russian onslaught. Ukrainian President Volodymyr Zelenskyy demanded a tough global response to Friday’s train station attack in Kramatorsk, calling it the latest sign of Russian war crimes. Russia denied it was responsible. Ukrainian authorities have called on civilians to get out ahead of an imminent, stepped-up offensive by Russian forces in the east. On Saturday, British Prime Minister Boris Johnson and Zelenkyy met in Kyiv in what Johnson’s office said was “a show of solidarity with the Ukrainian people.