FLORENCE — Authorities are investigating the deaths of two men who were struck and killed by an Amtrak train in Florence County.

Authorities say the accident happened shortly before 6 p.m. Thursday.

Florence County Coroner Keith von Lutcken says 28-year-old Bradley Keller and 22-year-old Jason David Mains were struck from behind while walking along the railroad tracks.

The coroner said that both men lived in the Florence area.

Officials said the Amtrak train, with 133 people aboard, was en route from New York to Savannah, Ga.

No one on the train was hurt.