The collision was reported at 10:36 a.m. on the tracks between Encinal and Watkins avenues and involved northbound train No. 113 that was headed from San Jose to San Francisco, Caltrain spokesman Dan Lieberman said.
There were 68 passengers aboard the train and no injuries were reported on board.
The northbound track remained closed as of 11:30 a.m., but the southbound track reopened for trains to move through the area at reduced speeds, Lieberman said.
The fatality is the fourth on Caltrain's right-of-way in 2022.
Caltrain struck a person who was trespassing on the tracks in Menlo Park this morning, officials said.
The person was struck by northbound train 113 at 10:36 a.m.
There were 68 passengers on board and none of them were injured, officials said
Caltrain is reporting delays near the scene.
Northbound train 505 is taking passengers from train 113.
Stay with ABC7 News for the latest details on this developing story.