By RFE/RL's Russian Service

Russia's Federal Security Service (FSB) said on April 1 that it has detained four people in the North Caucasus region of Daghestan suspected of providing financing and weapons to participants in the March 22 massacre at the Crocus City Hall concert venue near Moscow that killed 144 people. Video released by the FSB showed one suspect saying: "I took weapons to them, these guys who attacked Crocus City Hall. I took them weapons from [the regional capital] Makhachkala." It wasn't possible to determine if the admission was coerced. Russian officials earlier said that 11 suspects, including four men who allegedly attacked the entertainment center, had been arrested. The suspected gunmen have been identified as ethnic Tajiks.