The utility has noted multiple irregularities, but maintains there is no evidence its equipment sparked the destructive Eaton fire.

Edison International’s utility is looking at whether a power line retired in 1971 started the Eaton wildfire as part of a probe into the cause of the blaze that razed more than 9,000 structures.

Southern California Edison told state regulators Thursday that it’s investigating whether a line it had previously shut off may have played a role in sparking the Eaton Fire above Altadena.