On September 12, 2018 at approximately 7PM Transit Police officers assigned to the North District received a radio call to respond to Waltham for a report of a person possibly struck by a train. Multiple TPD units responded along with Waltham Fire and EMS. Transit Police personnel on scene report the following preliminary information: A male, approximately 20 years of age, while trespassing on the westbound track on the Fitchburg Line, in the vicinity of 400 River Street was struck by a MBTA Commuter Rail train. The male has sustained serious injuries and has been transported to a Boston hospital for emergency treatment.Transit Police detectives are currently investigating the facts and circumstances surrounding the incident. Foul play is NOT suspected.Media inquiries should be directed to Superintendent Richard Sullivan at rsullivan@mbta.com