Crews were not able to fight the fire at the abandoned sugar factory because of hazardous materials inside the building and weather conditions, sheriff’s officials said.

A fire broke out overnight at Longmont’s historic sugar mill, a landmark with deep ties to the city’s industrial past — here’s a look inside the iconic structure, originally posted by the Longmont Observer in May 2017.

The fire at the 120-year-old sugar factory was likely human-caused, said Rick Tillery, a spokesperson for the Mountain View Fire District.