(CNN) — Border Patrol agents conducted an operation at the site of Washington state’s biggest wildfire this week, and a Washington congresswoman’s office confirmed two firefighters were arrested at the site where first responders are working to contain the blaze that’s already torched almost 9,000 acres in the Olympic National Forest.

Officials handling the Bear Gulch Fire in northwest Washington said in a short statement Thursday they “are aware of a Border Patrol operation here.”

“The Border Patrol operation is not interfering with firefighting activity and Bear Gulch firefighters continue to make progress on the fire,” the statement continued.

Citing two unnamed firefighters at the scene, The Seattle Times reported two people working on the fire Wednesday were arrested during the

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