Nasim Aghdam, YouTube HQ shooter, was upset with company policies

Nasim Aghdam, the woman who opened fire at YouTube's headquarters near San Francisco on Tuesday, was disgruntled with company's policies, it has been revealed. Aghdam went on a shooting rampage at around lunchtime, wounding four people before shooting herself dead.

San Diego resident Aghdam, 39, had previously claimed in a video that YouTube "discriminated and filtered" her content, thereby limiting her audience reach.

"YouTube filtered my channels to keep them from getting views!" she reportedly said. "There is no equal growth opportunity on YOUTUBE or any other video sharing site."

Google CEO Sundar Pichai thanked police officials  and their own security team for their quick response in controlling the situation.

Pichai wrote: "Earlier this afternoon, while our employees were having lunch, we received reports of an active shooter at YouTube in San San Bruno. Law enforcement and our Security team worked to evacuate the buildings and prioritize the safety of everyone there,The best information we have is that the situation is contained. We are very actively monitoring and working with local authorities and hospitals.

"It's with great sadness that I tell you - based n the latest information - four people were injured in this horrific act of violence. We're doing everything we can to support them and their families at this time.I'm grateful to everyone inside and outside the company for the outpouring of support and best wishes. I am especially thankful to the first responders and our own security team who acted so quickly to keep people safe.I know a lot of you are in shock right now. Over the coming days, we will continue to provide support to help everyone in our Google family heal from this unimaginable tragedy.Let's everyone come together now to support Susan and the YouTube team."

On Tuesday evening, Aghdam's videos -- which covered a range of topics from vegan cooking to workouts and music parodies --  were taken down by YouTube.