"In the terrorist attack on Moscow, the group members planned to use a car full of explosives, and had bought a second-hand VAZ-2107 for the purpose," the FSB said. "On May 8, FSB officers discovered the car near a residential building in Profsoyuznaya Street."
The security agencies said the group that consisted mainly of North Caucasus nationals is suspected of committing a number of other terrorist acts, and that several suspects have been detained.
The residents of nearby houses were evacuated, and the district surrounded by police.
"Due to the difficulty and huge power of the explosive devices discovered in the car, their defusing by FSB bomb disposal experts lasted until May 9 afternoon," the FSB said.
An investigation is underway.
