Police say the woman was texting while walking on a platform at the Broadway-Lafayette Street stop around 10 a.m.
She apparently lost her balance and fell in front of an oncoming B train.
According to published reports, the train's first car rolled over her, but she likely fell into the rail bed.
She was taken to the hospital with non life-threatening injuries to her knees.
D train service was suspended between West Fourth Street and DeKalb Avenue and B trains were also delayed.
