The charred remains of an unidentified woman were discovered inside a burning port-a-potty outside a vacant Florida home on Saturday morning, a report said.

Firefighters found the body after responding to the blaze outside of a St. Augustine home that’s been under construction for several months, according to The Florida Times-Union.

Detectives from the St. Johns County Sheriff’s Office are working to determine the identity of the woman, and how she died.

“A person could have gone in there and the methane gas could have ignited somehow,” Chuck Mulligan, a spokesman for the sheriff’s office, explained to the paper.

“It might have been a suicide or something more nefarious.”

The spokesman seemed perplexed by the potential crime scene.

“In my 32 years in law enforcement, I’ve never seen one of these before,” Mulligan said.

An autopsy is expected to be completed on Monday.

The State Fire Marshal’s Office is searching for the presence of any accelerants in the portable toilet, which could indicate foul play.

Mulligan said their office hasn’t received any missings persons reports that could be linked to the woman.

“We are asking anyone who may have a family member or friend, who has not been heard from and may be missing, to contact the St. John’s County Sheriff’s Office and ask for the Major Crimes Unit,” he told the paper.