Investigators in Southern California are continuing to pursue answers as to what caused the Eaton Fire, which resulted in nearly 10,000 structures burning down in Los Angeles County. The latest findings point to a potential “zombie” power line.

An investigation by utility Southern California Edison is increasingly focused on whether a decommissioned line was re-energized, sparking the deadly blaze.

Though initially claiming there was no evidence its equipment was at fault, Southern California Edison is now investigating one of its “zombie” power lines as the possible origin of the deadly Eaton Fire.