A semi-trailer on a Rancho Haven property exploded Wednesday afternoon after oily rags allegedly self-combusted, according to the Washoe County Sheriff’s Office.

The sheriff's office said that shortly before 1 p.m., deputies were dispatched to Gymkhana Lane for a report of an explosion.

The homeowner told deputies he heard what sounded like a cannon, went outside, and saw the semi-trailer where he stores miscellaneous items on fire.

He said part of the trailer’s side had separated from its frame, indicating a minor explosion had occurred.

The Northern Nevada Consolidated Bomb Squad responded and determined that incorrectly stored oily rags allegedly caused the self-combustion.

“The Washoe County Sheriff’s Office and Truckee Meadows Fire want to remind everyone that even cloth rags can ignite. As the oil oxidizes, heat is released. If the heat is not dissipated, it can build up and ignite the cloth. If such cloths are stored in anything airtight, as the pressure of the fire builds, it will explode,” officials said.

No injuries were reported, and officials said there is no threat to the public.

Truckee Meadows Fire Protection District and the Northern Nevada Consolidated Bomb Squad assisted the investigation.