Firefighters were working to control a 60-acre wildland blaze on the burn scar of the 2002 Hayman fire in Jefferson County on Saturday evening that sheriff’s officials said was not threatening any structures or requiring evacuations.

The cause of what’s been named the 560 fire is “human accidental,” the Jefferson County Sheriff’s Office said in a tweet. It’s located approximately thee miles northwest of Cheesman Reservoir in Pike National Forest, in the area of Forest Road 560 and Forest Road 541, officials said.

Firefighters plan to work through the night, and will receive air support on Sunday, sheriff’s officials said.

Read more on this story at the Denver Post