A Turlock truck driver making a delivery to a Keyes feed factory was struck and killed by a train Thursday morning, according to the Stanislaus County Sheriff's Department.

The deceased has been identified as Miguel Vigil Ruelas, 64.

The train that struck Ruelas did not stop, indicating the train engineer was unaware of the incident. At this time, there are no known witnesses and investigators are unsure if it was a passenger or freight train involved, though the tracks are more frequently used by freight trains.

Sheriff's deputies were dispatched to the A.L. Gilbert Feed plant located on Jessup Road in Keyes around 7 a.m. Thursday after employees discovered Ruelas' remains.

The deceased was found along the east side of the railroad tracks, which is closer to Highway 99. He was pronounced dead at the scene.

Investigators have not determined how Ruelas ended up on the tracks, or if the death was a suicide. Ruelas had driven his truck to the feed plant that morning to make a delivery and the truck was located on the lot, with a partially full load. Employees discovered Ruelas after noticing he had been away from his truck for some time.