Several factors contributed to the suspicion of arson, Sims noted.
"We have a fire, then two hours later we have a fire," he explained. "Two south of Palo Pinto, one north, three west and one east of Palo Pinto. This has been in the last two weeks."
Witnesses and potential leads have been few so far, he added.
One rural resident reported noticing a small gray car in the area of the latest fire just before it started, though he cautioned there is no other evidence indicating the vehicle's involvement in the incident.
Harwell said authorities have not identified a person or persons of interest, explaining anyone with relevant information can contact him at (940) 325-5762, or the Palo Pinto County Sheriff's Office at (940) 659-2085.
Any help would be appreciated.