Gunmen have opened fire on crowds at a large concert hall in Moscow, killing an unspecified number of people - with explosions reported and a huge blaze at the venue, according to Russian state media.

Sky News' Europe correspondent Siobhan Robbins takes a closer look at what's happened in Moscow from Berlin.

More than 100 were wounded in the attack, the Russia's Federal Security Service said.

Read more: https://news.sky.com/topic/russia-5803

#moscow #shooting #gunmen

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