The Russian Federal Security Service (FSB) has detained members of a terrorist group who have been plotting suicide bomber attacks in Moscow.

According to the FSB, the terrorist attacks were being prepared under the guidance of a Daesh emissary from Syria.

Those detained plotted terrorist attacks on Moscow's transport infrastructure and large marketplaces, the FSB said.

"The actions of a terrorist group which intended to carry out a series of terrorist attacks in crowded places, including on transport objects and large shopping areas of Moscow with the use of terrorist suicide attackers and powerful explosives were foiled in the Moscow region."

A laboratory for the production of explosives, IEDs have been found and neutralized on Moscow's outskirts during a special operation.

The group of terrorists detained in the Moscow region comprises 3 nationals of Central Asian states and 1 Russian national.

Later in the day, it became known thar the group included one Russian citizen and three Tajik nationals. A Moscow court has so far authorized arrests for three of the four suspects, all of whom will remain in custody until October 11. All of those three suspects are from Tajikistan. Two of them have admitted their guilt. The FSB has not released any information about the fourth suspect.

Last week, Russian Federal Security Service (FSB) Director Alexander Bortnikov, who chairs Russia's National Antiterrorism Committee (NAC) said that the threat from international terrorist groups, including Daesh, and North Caucasus armed gangs, remains in crowded places. Bortnikov made the statement at a meeting of the committee on counterterrorism protection of facilities and crowded places, facilities of Russian transport infrastructure and measures to improve it.