Federal and local law enforcement authorities are investigating what caused the Sunday night fire, which came after a series of attacks against Tesla in rebuke of its chief executive, Elon Musk.

A fire damaged four Tesla Cybertrucks in a Seattle lot late Sunday, sparking an ongoing investigation into whether it was an accident or an act of arson.

Seattle fire officials said a late Sunday fire that damaged four Tesla Cybertrucks is under investigation. The four Cybertrucks were parked in a Tesla lot in Seattle’s industrial district. No one was injured,