In the attacks in the Dagestani cities of Makhachkala and Derbent, the sons of the head of the Sergokala district of the republic, Omarov, were involved. He has been detained, according to TASS and Interfax. A search is being conducted at the official’s home. He is giving testimony to the police, Russian propaganda agencies reported, citing law enforcement sources in the Russian Federation. According to Interfax, Russian security forces have killed four attackers in Makhachkala. Three of them have been identified as Omarov’s sons and nephew. It is also reported that the fire at the Derbent syn…