Relatives of a woman who opened fire at YouTube’s headquarters in California Tuesday said they told police, "She might do something."

Nasim Aghdam, 39, was identified as the shooter at the video-sharing site's San Bruno headquarters, who injured three people before turning the gun on herself.

Aghdam was reportedly "angry" at the company because it demonetized her videos and cut her ad revenue after a policy change, reports said.

The shooter posted videos last month in which she alleged YouTube tries to "censor and oppress people who speak the truth."

Aghdam's family said she was a passionate vegan activist and often posted videos about animal cruelty, ABC News reported.

She also posted fitness videos on her channel and frequently complained on camera about YouTube filtering her videos.

Some of Aghdam’s uploads had hundreds of thousands of views.

"YouTube filtered my channels to keep them from getting views!" Aghdam wrote on her website. “There is no free speech in real world & you will be suppressed for telling the truth that is not supported by the system. Videos of targeted users are filtered & merely relegated, so that people can hardly see their videos!"

YouTube removed Aghdam’s videos from the site on Tuesday afternoon after the shooting for violating the company’s terms of service.

Police said there is no evidence that Aghdam, who opened fire the day before her birthday, knew the victims. Her family claims they warned police prior to the attack.

Aghdam was reported missing by her family over the weekend after she stopped answering phone calls.

Police then reportedly located her vehicle near Mountain View, 30 miles east of YouTube headquarters.

Her family said once police notified them of this, they grew worried and warned officers.

"I Googled 'Mountain View' and it was close to YouTube headquarters, and she had a problem with YouTube," Aghdam’s brother, who did not want to be identified, told KGTV. "So I called that cop again and told him there's a reason she went all the way from San Diego to there, so she might do something.

"So they didn't do anything, and she got killed ... and three or four more people got hurt," he added.

A 32-year-old woman was in serious condition, a 27-year-old woman was in fair condition and a 36-year-old man was in critical condition after the shooting, according to a spokesperson at Zuckerberg San Francisco General Hospital and Trauma Center.

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