The four detained members of the terrorist group were citizens of Tajikistan and Moldova. Powerful homemade explosive devices were found. The FSB said its forces also managed to seize “a large amount of explosive blend material for making a high-energy explosive device.” Previously, on Saturday, Russian security services thwarted a plot to blow up targets in Moscow and St. Petersburg. The suspects of Central Asian origin were arrested in collaboration with law enforcement in Tajikistan and Kyrgyzstan, it has been reported. Russia has been a target of Daesh attacks since the country’s military began a campaign in Syria in late September 2015 to assist the Arab country in the fight against terrorism at the official request of the Damascus government.