Russian Federal Security Service (FSB), said four individuals were detained on Sunday in connection with an aborted "terror" plot supplied cash and weaponry for the lethal assault on a Moscow music hall one month prior.
In the deadliest incident to strike Russia in two decades, gunmen entered the Crocus City Hall venue on March 22 and set the building on fire, killing over 140 people.
Four people were detained by the Federal Security Service (FSB) in the southern Dagestan region on March 22. The FSB said in a statement on Monday that they "were directly involved in the financing and supply of terrorist means to the perpetrators of the terrorist act carried out on March 22 in the Crocus City."
On Sunday, Russia’s national anti-terrorism committee said it had apprehended three people who were “planning to commit a series of terrorist crimes.”
The FSB said Monday that four foreign citizens had been arrested in the operation in the regional capital Makhachkala and the nearby town of Kaspiysk.
Russian authorities had previously announced the arrests of 12 people they say are connected to the attack – including the four suspected gunmen, who have been identified as Tajik citizens.
The Islamic State (IS) has claimed responsibility for the massacre, the most deadly it says it has ever carried out on European soil, though President Vladimir Putin has talked up a Ukrainian and Western connection.
The Islamic State group said four of its members had been arrested after they attacked a concert hall near Moscow killing 143 people, a day after Russia blamed Ukraine.
AFP