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US subway trains in collision
From BBC


Fire crews are at the scene of the accident

Two rush-hour subway trains have collided in Washington DC, killing at least one person, according to reports.

Washington transport authorities said "massive injuries" had been reported.

"Metro reports that two trains collided and one train is on top of the other train. Metro reports massive injuries at this time," it said in a statement.

ABC reported the crash happened above ground in the Takoma Park area of the city at 1700 local time (2200 BST). Emergency crews are on the scene.

Washington fire spokesman Alan Etter told the Associated Press news agency at least one person had been killed and the crash was developing into a "mass casualty event".

He said crews were cutting apart the trains to get people out. He said there were severe injuries, but no indication of how many.