The woman struck and killed by an Amtrak train Wednesday afternoon in South Attleboro was 26-year-old Laura Kibuuka of Watertown. MBTA spokesman Joe Pesaturo released the information on her identity Friday afternoon.

Kibuuka was struck by an Acela Express train near the station at 1315 Newport Ave., which can reach up to 150 mph. Pesaturo said Wednesday that it was unclear why she was on the track. He said Friday that the incident remains under investigation by the MBTA Transit Police.

There were 197 passengers aboard the train, which was traveling from Washington D.C. to Boston. No passengers or crewmembers were injured.