A suspicious death investigation is underway in Yuba County after a person was discovered on fire Thursday morning, authorities said. 

The Yuba County Sheriff's Office said it responded to a report of a fire in the area of Parks Bar Road near Smartsville around 6 a.m. after dispatch received information that a person may have been on fire. 

After fire crews extinguished the fire, a person was found dead at the scene, the sheriff's office said. 

"The circumstances surrounding the death are considered suspicious, and an active investigation is underway," deputies said. 

The identification of the victim and details about the fire have not been released.