An unidentified woman was killed last night at Metro Center after she apparently jumped into the path of a train arriving on the Blue and Orange line, a Metro spokeswoman said.

Metro's Mary Bucklew said witnesses told authorities the woman jumped onto the tracks and was struck by an Orange Line train bound for New Carrollton about 8:54 p.m. The woman was declared dead on the scene, Bucklew said.

She said D.C. Fire Department rescue workers moved the woman's body to the platform shortly after 9:30 p.m., when power was restored and the train was moved.

Muhammad Al-Hashimi, 39, said he was sitting on a bench with his back to the platform "when I heard this woman scream." When he stood and turned, Al-Hashimi said, the woman "jumped out in front of the train."

"She jumped in such a manner that it would be impossible for the driver of the train to avoid hitting her," said Al-Hashimi.

He said he tried to console the train operator, K.N. Nixon, who "was shook up pretty badly." Other witnesses "were just in shock," he said.

R. Aitcheson, 25, said that a woman who had been standing near the victim "said she was just going to ask [the victim] what she was doing standing so close to the edge."

Bucklew said Metro Transit Police and D.C. homicide detectives are investigating the incident.