Cops in California have named the woman who opened fire at YouTube’s headquarters in San Francisco, injuring three, before killing herself.

Officials from the San Bruno police department identified her as 39-year-old Nasim Najafi Aghdam.

According to the Guardian, police said the motivation was unclear, but her father, Ismail Aghdam, told the Bay Area News Group from his San Diego home that she was furious with YouTube because it had stopped paying her for videos she posted on the platform.