Russia’s top counterterrorism body on Monday blamed Ukrainian intelligence agencies for the bombing attack that killed a well-known Russian military blogger who fervently supported Moscow’s war in Ukraine.

Russian officials said Vladlen Tatarsky, 40, was killed Sunday as he was leading a discussion at a cafe on the banks of the Neva River in the historic heart of St. Petersburg. Over 30 people were wounded by the blast, and 10 of them remain in grave condition, according to the authorities.