Officers and medics responded to the scene, the East Titus Street railroad crossing in downtown Kent, at about 2:20 p.m. after receiving a report of train hitting a pedestrian, said Jarod Kasner of the Kent police.
The man was found dead at the scene.
Witnesses told police the man was walking east on Titus Street, bypassed the lowering traffic control gates at the intersection and walked onto the crossing as the passenger train was approaching.
The train was unable to stop in time and struck the man, who has not yet been identified.
The Kent police, Burlington Northern Santa Fe police and Amtrak are working together to determine the man's identity and the sequence of events that led to the fatal accident.
Kasner said the Titus Street railroad crossing is equipped with large, light-reflective gates, as well as red flashing signals and audible bells.