Metro officials said a person in a wheelchair appears to have fallen onto the track bed at Potomac Avenue station.

The incident happened about 2:30 this afternoon.

The person was “assisted back to the platform” by passengers nearby, according to Metro spokesman Dan Stessel.

This is not the first time this type of incident has occurred.

In August, a person in a wheelchair was removed from the Metro track bed at Union Station. Neither individual was struck by a train.

In January 2010, nearby passengers helped rescue a disabled woman from the track bed at Union Station after her motorized wheelchair overturned. In December 2009 a blind Rockville man died after falling from the platform at Gallery Place and being struck by a train. In June 2009, a man in a wheelchair rolled off the platform at Southern Avenue Station. He was rescued by emergency workers and taken to the hospital with a head injury.

Follow me on Twitter @postmetrogirl.