As a severe accident on Moscow's metro left at least a dozen dead on July 15, passengers documented the aftermath and the rescue efforts on social media sites like Twitter and Instagram.
The Moscow Times: Moscow metro passengers post eyewitness accounts of deadly accident
A policeman stands guard next to the bodies of two victims. At least 20 people have been killed and 120 people injured after three metro cars derailed near Moscow's Slavyansky Bulvar station July 15 morning.