Thirty-one train cars, including one carrying molten sulfur, were involved in a CSX train derailment on Tuesday morning in Todd County, Kentucky.

The derailment occurred just after 7 a.m. local time near the rural city of Trenton, near the Tennessee border; no injuries were reported, according to CSX. The car carrying molten sulfur caught fire, leaking the chemical into the air and prompting officials to instate a shelter-in-place order for Trenton. The order was lifted at approximately 11 a.m. local time, authorities said.