Russia has arrested 11 people, including four suspected gunmen, in connection with a shooting rampage that killed at least 133 in a concert hall near Moscow on Friday, the Kremlin said. Up to five gunmen are believed to have been involved in the attack, later claimed by Islamic State in a post on Telegram, which suggested that the attackers had escaped afterwards. Videos emerged showing at least two gunmen in tactical gear walking into the hall and opening fire with automatic weapons as panicked Russians fled for their lives Moscow concert hall attack: what we know so far Moscow concert hall attack – live updates