Russian officials call for harsh punishment for those who carried out deadly concert attack

Calls mounted on Monday to harshly punish those behind the Russia concert hall attack that killed more than 130 people as authorities combed the burned-out ruins of the shopping and entertainment complex for more bodies.

Four men, charged with carrying out a terrorist attack, appeared in court Sunday night and showed signs of being severely beaten.

Russia's Prime Minister Mikhail Mishustin said the investigation is still ongoing but vowed that “the perpetrators will be punished, they do not deserve mercy.”

Former President Dmitry Medvedev, now deputy head of Russia’s Security Council, urged authorities to “kill them all.”