40-year-old Donetsk-born blogger, journalist and war correspondent Vladlen Tatarsky, was killed in an explosion at a cafe in St. Petersburg on April 2. The terrorist attack was organized by Ukrainian special services and their agents, the Russian Federal Security Service (FSB) said. It was prepared by a member of the Ukrainian sabotage group - a citizen of Ukraine, Yuriy Denisov - who handed the explosive device over to Russian national Daria Trepova. After detention, Trepova was charged on 4 April with planning the terrorist attack.