Today it feels like the entire community of YouTube and all of the employees were victims of this crime. Our hearts go out to those who suffered in this particular attack,"

The suspect in a gun attack at YouTube's HQ in California had expressed anger over its treatment of her video postings, media reports say.Police have revealed few details about her but US media said she ran a number of channels and a website, posting videos on a variety of subjects including those highlighting animal cruelty. The channels have now been deleted.

In January 2017 she posted a video complaining that YouTube was filtering her content, leading to fewer views.

On her website she also ranted against YouTube, saying: "Videos of targeted users are filtered and merely relegated, so that people can hardly see their videos."

She also quotes Adolf Hitler, saying: "Make the lie big, make it simple, keep saying it, and eventually they will believe it."

She also wrote: "There is no equal growth opportunity on YouTube or any other video sharing site. Your channel will grow if they want [it] to!"

Aghdam's father, Ismail, told local US media she was angry because YouTube had stopped paying her for videos.

Video posters can receive money from linked advertisements but the company can "de-monetise" channels for various reasons, taking adverts off. It is unclear if this happened with Aghdam's material.

Her father said Aghdam had been reported missing on Monday after not answering calls for two days. Police later found her sleeping in her car in Mountain View, 25km (15 miles) south of the YouTube offices in San Bruno and reported this to her family, but they did not detain her.

Her father told police she might go to YouTube as she "hated the company", local media said.

YouTube terminated her account following the shooting. Her Instagram and Facebook accounts have also been removed.