Arson investigators are continuing their probe into what caused a vacant house south of El Centro to burn to the ground Thursday.
"There's nothing apparent at this time," said county fire Capt. Lon Hettinger.
Cracked masonry arches, a fireplace and some plumbing were all that remained standing of the house at the corner of West McCabe and Dogwood roads Thursday afternoon as firefighters sprayed water on the last of the smoking timbers.
Homeowner Carolyn Janzen had moved out of the house but was still conducting her legal practice from an office in the home with her assistant, Jose Woo. A for-sale sign and an attorney's business sign were posted at the end of the short driveway on the wooded estate.
Hettinger said there is much work to be done before the cause of the fire is known.
County Sheriff's Office logs indicate the fire is suspicious in nature. Hettinger said any time the cause of a fire is unexplained, it is suspicious.