The suspects were arrested in the city of Ekaterinburg in the Urals Region, the Russian Federal Security Service (FSB) confirmed. It is also believed that the main leader of the group came to Russia from Turkey and that the group were planning to flee to Syria after the attacks.

Russian intelligence believe the cell were planning to attack targets in two of Russia’s largest cities as well as the Sverdlovsk Region. The suspects were preparing to deliver several 'high-profile terrorist attacks using self-made explosive devices,' the FSB said, according to Russia Today.

The members of the alleged terror cell are believed to a mixture of nationalities from Russia and several of the Central Asian countries. Hand grenades, handguns were found along with the components for improvised explosive devices, including detonators.

Also yesterday seven people have been arrested in Spain on suspicion of supplying weapons and bomb-making equipment to ISIS leaders in Syria and Iraq.

Six men were held during dawn raids in Alicante, Valencia and Spain's north African enclave of Ceuta, with a seventh person was arrested later in the morning.

Spain's acting Interior Minister Jorge Fernandez Diaz said they were believed to be part of a rerrorist group that sent the weapons in shipping containers, disguised as humanitarian aid.