Residents of Saint-Petersburg lay flowers at a makeshift memorial for Russian military blogger Vladlen Tatarsky, whose real name is Maxim Fomin and who was killed in an explosion in a cafe in St.Petersburg on April 2. "I got a shock. Because this is one of the significant presenters (authors) for me," says local student Igor Ivanov, who has come to pay his respects. Russia has detained a 26-year-old woman, saying the attack was orchestrated by Ukraine, with help from supporters of jailed critic Alexei Navalny. Ukraine blames Russia's domestic in-fighting for the blast. IMAGES AND SOUNDBITES