a southbound amtrak train number both csxboston struck employees, causing fatal injuries. at this time, we don't have information regarding -- leading us to believe that any other rail employee or passenger was injured. emergency responders were notified and arrived on scene to secure the scene. and offer assistance. representatives from csx and amtrak are unseen and are fully cooperating with the ntsb investigation. -- are on the scene. her investigators will continue to document the scene, including the tracks and involved trains. they will be speaking with witnesses and rail personnel and our investigators will gather all available evidence. earlier, our mission here is to understand not only what happened, but why it happened, so similar events can be prevented in future. the investigation process is necessarily complex. we don't determine the probable cause of the next and while on on scene -- accident while the scene or in the initial phase of the investigation, nor do we speculate on what the causes of the accident were at this point. our investigators have been on