A nationwide day of mourning has begun in Russia after Vladimir Putin declared 24 March a day to remember the 133 people killed at Crocus City Hall.

Russian authorities say all those responsible have been detained. Islamic State says it was behind this devastating attack.

Warning: This report contains distressing images

Read the latest: https://news.sky.com/story/russia-moscow-shooting-latest-ukraine-islamic-state-live-sky-news-blog-12541713

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