The death toll in Friday’s terror attack on a concert in Moscow has soared to at least 133, Russia’s top state investigative agency said Saturday, with authorities saying they have apprehended 11 suspects, four of whom were directly involved in the onslaught.

President Putin addressed the shocked nation in a televised broadcast on Saturday, slamming the massacre as "a bloody, barbaric terrorist act." He declared Sun., March 24, a day of mourning.