Four suspects in Moscow concert hall terror attack appear in court

Footage of gunmen reinforces Islamic State's claim to have masterminded worst terror attack on Russia in two decades

Four suspects have appeared in court in Moscow charged over the terrorist attack on the Crocus City concert hall on Friday that left 137 people dead.

The men were officially identified as citizens of Tajikistan, the Tass state news agency said, and were remanded in custody for two months at Sunday's hearing.