The leader of the separatist rebels in the eastern Ukrainian city of Slavyansk, Vyacheslav Ponomaryov, attends a press-conference in Slavyansk on April 20, 2014. Pro-Kremlin rebels in east Ukraine appealed Sunday for Russian "peacekeepers" to sweep in after a deadly gunfight killed at least two of their militants, shattering an Easter truce and sparking "outrage" in Moscow. But the Western-backed authorities in Kiev claimed the violence was a set-up by Russia to create a pretext for it to send troops in. AFP PHOTO / KIRILL KUDRYAVTSEV