Fire officials say a cooking fire at a homeless camp appears to have started last month's Sullivan Fire behind Hug High School. 

The June 12th brush fire has since been fully contained at 138-acres. 

Truckee Meadows Fire & Rescue officials say they're still looking for the people responsible for starting the fire.

No buildings were threatened and no injuries were reported. 

An investigation is still being conducted Truckee Meadows Fire & Rescue and the Sparks Fire Department. 

The Sparks Fire Department and the Bureau of Land Management have jurisdiction over the blaze.Â