Russia’s popular rock band Piknik, who had been set to perform on Friday at the venue in the outskirts of Moscow where gunmen killed 137 people, have paid tribute to the victims of the terrorist attack. Members of the Russian band laid flowers for the victims in front of the Crocus City Hall on Sunday evening, expressing their condolences to the bereaved families of the 137 dead after a minute’s silence, state news agency TASS reported. “This atrocity is a senseless, unimaginable cruelty,” band leader Edmund Shklyarsky said. The rising official death toll from the attack includes a missing emp…