FORT WAYNE, Ind. (WANE) — One person is dead after a fire spread into the TJ Nowak Supply Company maintenance building Friday night.

Firefighters responded to a structure fire in the area of 300 W. Superior St. near Promenade Park, and numerous firetrucks were surrounding a building that had smoke coming out of it.

The Fort Wayne Fire Department (FWFD) said firefighters arrived and found smoke and fire coming from the building and from multiple portable toilets along the building.

In a press release from TJ Nowak Supply Company, the onsite investigator said the fire originated from a campfire that an individual had made while sleeping outside. This fire spread to the portable toilets, which created “enough heat to damage the exterior of the building.” Soon after, the fire spread into the building.

Some firefighter crews forced their way into the building and attacked the fire from the inside while other crews attacked the fire from the outside, according to the FWFD.

The FWFD said authorities then found a body while dealing with the fire, but the FWFD did not specify whether the body was found inside or outside of the building. According to TJ Nowak Supply Company release, they shared that “the individual who started the fire perished outside.”

The building suffered heavy smoke damage along with moderate fire and water damage, according to the FWFD.

Crews were able to the get the fire under control in 16 minutes.

Police were also seen combing the riverbank near the scene of the fire, but it is not known if or how their actions are related to the fire.

The cause of the fire is still under investigation.