Pro-Russian activists react as a crowd of some 300 of them stormed the prosecutor's office in eastern Ukrainian city of Donetsk  on May 1, 2014. The mob hurled rocks and Molotov cocktails at around 100 riot police defending the building, who responded with stun grenades and tear gas, in the latest unrest to hit the crisis-wracked eastern part of Ukraine. AFP PHOTO/ GENYA SAVILOV        (Photo credit should read GENYA SAVILOV/AFP/Getty Images)