Texas officials announced Thursday the Smokehouse Creek Fire was caused by power lines. The utility company said it is also conducting its own review.

Xcel Energy facilities “appear to have been involved in an ignition” of a giant wildfire that’s been blazing across the Texas Panhandle since last month, the company said in a statement Thursday.

The utility did not provide additional details on how it came to the determination, but said it was based on “currently available information.”

“Xcel Energy disputes claims that it acted negligently in maintaining and operating its infrastructure; however, we encourage people who had property destroyed by or livestock lost in the Smokehouse Creek fire to submit a claim to Xcel Energy through our claims process,” the statement said.

The Texas A&M Forest Service said Thursday investigators determined the Smokehouse Creek Fire — the biggest in state history, burning well over 1 million acres — and the Windy Deuce Fire were caused by power lines.

The forest service did not say whether the power lines that ignited the fires belonged to Xcel Energy.

The ongoing Smokehouse Creek Fire is the largest blaze in state history, burning more than 1,059,570 acres, according to the forest service. Two people have been killed in the blaze and authorities estimate 500 structures have been destroyed as a result.

As of Thursday morning, the forest service reported the fire was 74% contained, with two adjacent fires still burning, as well. The nearby Grape Vine Creek Fire was at 96% contained, while the Windy Deuce Fire was 89% contained.

Claims filed to Xcel Energy will be handled expeditiously, prioritizing those who lost their homes in the fire, the company said.

Utility companies in recent years have been accused of sparking major wildfires in both Hawaii and California. Last year, residents filed a lawsuit against Hawaiian Electric alleging years of negligence and failure to shut down its power system before harsh winds hit Maui.

Hawaiian Electric acknowledged a downed power line started a fire on Aug. 8, according to The Associated Press. The utility company said firefighters left the scene of that fire after declaring it contained, but a second wildfire broke out and spread to the city of Lahaina, killing at least 101 people.

California’s Pacific Gas & Electric Co. agreed to pay $13.5 billion in damages to wildfire victims in 2019, after residents filed suits against the company in connection with four fatal fires across three years. The fires covered by the settlement included the 2015 Butte Fire, the 2016 Ghost Ship Fire, the 2017 Tubbs Fire and the 2018 Camp Fire.