Firefighters from 15 departments battled an early morning blaze at a commercial structure in Huntington Station.
The fire broke at 191 E. 2nd St. at a business called Four-Way Pallet.
According to officials the call for the fire came in at 1:10 a.m.
Train service was temporarily suspended between Port Jefferson and Huntington Station, where the tracks pass behind the building, but has since been restored with restricted speed for trains.
No injuries are reported at this time.
Arson squad detectives are investigating the fire.