A trespasser on the railroad was struck and killed by an outbound Franklin Line commuter rail between the Islington and Norwood stations at about 9:50 a.m., said MBTA spokesman Joe Pesaturo.
"[The] incident did not occur near a station [or] a crossing," Pesaturo said.
The man was described as middle-aged, he added.
Transit police are investigating the incident.
Service on the Franklin commuter rail line was disrupted due to the accident, according to officials.
Today's was the second commuter rail-related death in two weeks.
Another man was struck and killed by an MBTA commuter rail near the Lynn Station around 6 a.m. on Aug. 20. MBTA officials also described that victim as a trespasser.