Moscow train derailment: Footage from inside metro

The death toll in Tuesday's derailment on the Moscow metro has risen to 19, the Russian emergency ministry says.

Some of those hurt were carried out of the tunnel on stretchers, with the most serious cases airlifted to hospital.

This video shows passengers' videos from inside the metro system and the emergency services at work outside.

The BBC's Oleg Boldyrev told BBC World News it was not clear what had caused the derailment.