The YouTube shooter visited a local gun range the morning before she opened fire at the company’s headquarters Tuesday, according to police.

San Diego resident Nasim Najafi Aghdam used her own legally purchased 9mm Smith & Wesson when she gunned down three people at the video-sharing website’s San Bruno offices and then killed herself, San Bruno Police Chief Ed Barberini told reporters.

She doesn’t appear to have had any direct relationship to her victims, and seems to have been motivated by anger at the “policies and practices of YouTube,” Barberini added — confirming the motive posited by her family members. 

Aghdam accessed the company’s campus through a parking garage, he said.

Police don’t suspect any other people were involved in the rampage, and are searching two residences in Southern California “associated with the suspect,” he said.

Barberini said it was too early in the investigation to say if the shooting “rises to the level of terrorism.”

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