A woman was struck and killed by a train in Somerville early Wednesday morning, according to Wicked Local news partner WCVB.

The victim, a woman in her 20s, was struck at 6:30 a.m. near Washington Street, while "trespassing" on the right of way, Transit Police said.

The MBTA said the Fitchburg Line was experiencing delays due to police activity near Porter Square.

It’s the third time a person was struck by a train in the past few days.

A man was struck and killed by a commuter rail train Concord late Monday, just hours after a person was struck by an MBTA train in Newton.

Train strikes are a growing concern for the MBTA. More than 70 people were injured or killed on MBTA or Commuter Rail lines through June of this year, and there have been more since then.

The MBTA launched a new awareness campaign last month aimed at trying to keep people away from the tracks.

Check back for more information on this developing story as it becomes available.