The woman, reportedly in her 40s, was in full cardiac arrest when she was found on the station's electrified third rail, Manresa said. The electricity was shut off so the woman could be rescued and given CPR. She was taken to a hospital where she later died, according to Manresa.
The victim had not been identified Saturday afternoon.
The accident caused 10-minute delays for other trains on the route but operations were back to normal by 2:30 p.m., according to the Metropolitan Transportation Authority.
The incident was under investigation.
