A subway derails in Moscow

MOSCOW — A morning commute ended in darkness, smoke and mayhem for passengers on the Moscow metro on Tuesday when a train derailed underground, killing at least 20 people and injuring more than 100 others.

Witnesses described being suddenly heaved out of their seats and landing in piles in the center of the cars as three derailed and jackknifed in a tunnel about 200 yards from the Slavyansky Boulevard metro stop.

All the fatalities were in the lead car of the train, a deputy mayor told reporters. Television footage showed it crumpled as other wagons pushed into it from behind.