MBTA Transit Police are investigating the death of a woman apparently struck by a commuter rail train in Somerville during the Wednesday morning commute, the second death on the Fitchburg line this week.
The person was struck around 6:30 a.m., prompting the MBTA to cancel Fitchburg line Train 402 as it arrived at the Red Line station in Porter Square, where passengers boarded subway trains to complete their trip.
The woman was in her 20s and was struck while on the tracks near Washington Street in Somerville, Transit Police wrote in a Facebook posting.
“Foul play not suspected,’’ Transit Police tweeted.
The woman was pronounced dead at the scene and her death is under investigation by Transit Police and Middlesex District Attorney Marian T. Ryan’s office.
Delays are expected during the morning commute for the Fitchburg line, according to the MBTA and Keolis Commuter Services, the train operator.
The death was the second this week involving the Fitchburg commuter rail line.
On Monday around 10:30 p.m., an 18-year-old man was struck and killed by an commuter rail train in Concord.
The man, whose name was not released, was struck while on the tracks of the Fitchburg line around 10:30 p.m. Sunday, according to Transit Police, which is leading the investigation along with Ryan’s office and Concord police.
The incident took place where the tracks run near Nashoba Road, according to Transit Police.
“Foul play is NOT suspected,” Transit Police wrote in a posting on its website.