LIVE: Moscow terror attack: Russia observes day of mourning

View of the concert venue west of Moscow that became scene of a shooting massacre on Friday, March 22 in which at least 133 were killed and 145 others were injured. Russia said on Saturday it had arrested all four gunmen suspected of carrying out the deadly attack, and President Vladimir Putin pledged to track down and punish those behind the attack. Read the best of our journalism: Subscribe to The Times and The Sunday Times YouTube channel: Find us on Facebook: Find us on Twitter: Find us on Instagram: #livestream #russia #moscow