
Officials say it's unclear what caused the deadly rush-hour collision of two Metro trains in northeast D.C.
At least four people have been killed, including a female train operator.
D.C. fire department spokesman Alan Etter described the collision as a "mass casualty event."
He says crews had to cut apart the wreckage to free some passengers.
Metro general manager John Catoe says at least 70 people were taken off the trains. He said he doesn't know what caused the accident.
It happened about 5 p.m. near the Fort Totten station on Metro's red line.
Photo Credit: @technosailor of Bethesda, Md., posted this TwitPic of the incident




An American cargo ship captain held hostage by pirates in a lifeboat off the coast of Somalia is once again a free man, and is now resting comfortably on a U.S. Navy vessel following a daring rescue. Richard Phillips was freed by the Navy commandos in an operation that resulted in the deaths of three of his captors.
Efforts are continuing to free an American cargo ship captain held hostage by Somali pirates.