Russia mourns victims of concert hall shooting

Russia lowered flags to half-mast on Sunday for a day of mourning after scores of people were gunned down with automatic weapons at a rock concert outside Moscow in the deadliest attack inside Russia for two decades.

President Vladimir Putin declared a national day of mourning after pledging to track down and punish all those behind the attack, which left 133 people dead, including three children and more than 150 were injured.

"I express my deep, sincere condolences to all those who lost their loved ones," Putin said in an address to the nation on Saturday, his first public comments on the attack. "The whole country and our entire people are grieving with you."

The Islamic State claimed responsibility for Friday's attack, but Putin has not publicly mentioned the militant group in connection with the attackers, who he said had been trying to escape to Ukraine, He asserted that some on "the Ukrainian side" had prepared to spirit them across the border.

Ukraine has repeatedly denied any role in the attack, which Putin also blamed on "international terrorism."

People laid flowers at Crocus City Hall, the 6,200-seat concert hall outside Moscow, where four armed men burst in on Friday just before Soviet-era rock group Picnic was to perform its hit "Afraid of Nothing."

The men fired their automatic weapons in short bursts at terrified civilians who fell screaming in a hail off bullets.

It was the deadliest attack on Russian territory since the 2004 Beslan school siege, when Islamist militants took more than 1,000 people, including hundreds of children, hostage.

Long lines formed in Moscow on Saturday to donate blood.

In the southwestern city of Voronezh, people were laying flowers and lighting candles at a monument to children who died there in a World War Two bombing in solidarity with those who died in the attack near Moscow.

Reuters