MARC rail service is not affected by Tuesday's train derailment.
In an alert emailed to riders, Maryland Transit Administration officials said the crash "does not involve or affect MARC or Amtrak trains at this time."
Crews from around the Baltimore area are on the scene of the freight train derailment, which happened Tuesday afternoon on CSX-owned tracks near the Baltimore city-county line.
MARC's Penn line serves Martin State Airport, Aberdeen, Edgewood and Perryville on Amtrak tracks.