During the raid, firearms, ammunition, extremist literature and symbols of IS were seized.
The operation of the FSB was carried out in cooperation with the Ministry of the Interior and the National Guard. Since the beginning of this year, Russian security has aborted at least 15 terrorist attempts.
Last Friday, the FSB deactivated an underground cell of the IS that prepared actions of high impact in this capital.
According to the FSB press service, six members of an underground cell of IS, arrested in the Moscow province, planned to attack with machineguns and home-made bombs in downtown places of the city.
In the raids carried out in homes of the detainees were found many firearms, homemade bombs and blueprints to prepare them, communication media, reports on how to carry out terrorist actions and money.
Previously, the FSB reported it had arrested in the western enclave of Kaliningrad nine persons in charge of recruiting future members of IS.
The Secretary of the Russian National Security Council, Nikolai Patrushev, said an increase in the activity of extremist groups in Siberian regions was noted, where over the last times, he asserted, increased the number of immigrants from Central Asia.
