As officials search for the origin of various fires that have devastated wide swaths of Southern California, a new lawsuit alleges that the Eaton Fire began from an electrical spark at a utility transmission tower.

A law firm suing utility company Southern California Edison on behalf of an Altadena, California, resident who lost their home in the fire alleges that surveillance video from an area gas station proves the utility company’s power lines ignited the Eaton Fire earlier this month.