Baku, March 23, AZERTAC Intelligence agencies have detained 11 people, including four terrorists, who were directly involved in an attack on the Crocus City Hall, TASS reports citing the statement of Russia’s Federal Security Service (FSB). "The activities of intelligence and law enforcement agencies have resulted in the detention of 11 people, including four terrorists, who directly participated in the terrorist attack on the Crocus City Hall," the statement reads. Work is underway to identify terrorist accomplices and establish all the circumstances of the attack.