Investigators said earlier a power surge caused the train to stall and several cars to come off the rails between the Slaviansky Boulevard and Park Pobedy stations.
"It braked very hard. The lights went off and there was lots of smoke," a man, his nose bloodied, told Rossiya-24 television.
While the Moscow metro system has been targeted by bombers in the past, terrorism is not suspected in today's disaster.
The Myths of Katrina Ten years after the storm, falsehood about warnings, violence, and recovery persist. Here’s the truth.
What Happened at Slate This Week? International affairs writer Joshua Keating on what to read to understand the apparently permanent slowdown of the Chinese economy.
“Dressing a Refined Story With a Touch of Vulgarity”: An Interview With Elena Ferrante’s Art Director