The death toll stands at 133 and the number of injured has risen to 152, according to the ministry.

On Friday night, unidentified gunmen fired indiscriminately at concert-goers at Crocus City Hall in suburban Moscow, causing substantial civilian casualties. A large blaze later led to the collapse of the building's roof.

On Saturday, Russia's Federal Security Service revealed that 11 individuals connected to the attack were apprehended, including four direct perpetrators.

In a televised national address on Saturday, Russian President Vladimir Putin vowed to identify and punish all those behind the attack and declared March 24 a day of national mourning.