Video shows woman caught in door, dragged onto train tracks in San Francisco

Officials in San Francisco are promising a full investigation after a frightening video was released showing a woman getting her finger caught in a closing train door and dragged onto the tracks under the train.

In the surveillance video, the woman can be seen walking down the stairs at the city's Embarcadero station on April 12 when she tries to get on the Muni train as the doors are closing. It appears as though her hand gets stuck in the door as it is closing. She can be seen talking to an employee standing on the platform just feet away, but the train starts moving and she is dragged off the platform and under the train.