A train derailed in the Bronx district of New York City on Sunday morning, killing four passengers and injuring 63 others.
The Korean Consulate General in New York on Monday said Ahn Ki-sook (35), a registered Korean nurse, was among the dead.
Ahn, who worked the night shift in a nursing home in Ossining, New York, was on her way back home to Queens when the accident occurred. She arrived in the U.S. on a work visa in December 2009. She later earned a master's degree there and was waiting for permanent residency, the New York Times reported.
Consulate officials identified Ahn at the scene and informed her family in Korea, a spokesman said.
The other dead were two men in their 50s and a woman. Some 11 injured passengers remain in serious condition.
The train went too fast into a bend in the line north of the Bronx's Spuyten Duyvil station, and the New York Police Department and the National Transportation Safety Board believed that brake failure was the most probable cause of the accident.