Southern California Edison is looking into whether its equipment is tied to the Eaton and Hurst Fires, its parent company said, though the cause has not been officially determined.

The utility company said its equipment may have caused the fire but that an investigation is continuing and that they are cooperating with authorities.

However, the Edison International unit has not identified evidence to confirm this, according to a filing with the California Public Utilities Commission.

SoCal Edison’s latest report to the California Public Utilities Commission includes new information about the Eaton Fire in Altadena and Hurst Fire in Sylmar.

A California utility said Thursday that its equipment likely sparked a wildfire in Los Angeles that broke out the same day as two massive blazes in the area killed at least 29 people and destroyed thousands of homes.

Southern California Edison (SCE), a subsidiary of Edison International , said on Thursday that it was probing whether its equipment was associated with the ignition of two Los Angeles-area wildfires this year.

New regulatory filings shows power line surges, malfunctions during high winds, including at a transmission tower near where Hurst blaze began.