CHICAGO (CBS) — A woman was struck by an Orange Line train Thursday morning, after stumbling onto the tracks at the 35th/Archer stop in the McKinley Park neighborhood.

Police said the 29-year-old woman was walking backwards while looking at the train schedule, when she fell onto the tracks around 10:25 a.m.

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The woman laid on the tracks for about four minutes before a southbound train approached. Police said the conductor spotted the woman on the tracks, but could not stop in time, and the first car on the train ran over her.

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She later was taken to Mount Sinai Hospital in critical condition.

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The CTA suspended service between Midway and Halsted for about an hour after the accident, and after trains began running along that section again, they bypassed the 35th/Archer station until about 1:30 p.m, when normal service resumed.