Reuters has quoted officials and local media as saying that the woman himself was suicidal after shooting three people in the headquarters of YouTube on Tuesday.
The attack happened in the YouTube headquarters in a Florida school attack in February claiming that 17 people were killed in a gunman's attack on the United States.
In California, 1700 employees work in this headquarter of YouTube owned by Alfabet Inc.
The identity of the suicide woman or why this attack, the police could not tell its cause.
The BBC said the panic began to spread throughout the region at around 12:30 local time on Tuesday, after the start of the raid spread, the rush began.
Witnesses said the suspect attacked the expatriates and dining areas and opened fire at lunch break, police said, citing witnesses.
The local media reported the name of the attacker, Nasim Ahmadam, by quoting unidentified sources. San Bruno Police and Youtube spokesman Jessica Mason did not immediately agree to comment on the identity of the attacker.
Claiming that the attacker was linked to the website Nasimasabaj.com, the US media claimed. The website also has a number of posts which are subjected to severe criticism against Persian culture, vzanism and YouTube.
In those posts, the users who make video content for YouTube do not share the appropriate dividends with the video content sharing site.
"YouTube is not given equal opportunities for development, not even a site that is shared with the video; Your channel will develop immediately, when they want to, "The anger that met in a post at Nasimesbased.com.
On Tuesday evening, the YouTube account of Nasimasabas was closed, Reuters reported.
A US government official said that links to this incident were not linked to terrorism.
Suicide woman was between 35 and 40 years old; According to an unnamed source of law enforcing agencies, he lived in southern California, according to ABC News.
US President Donald trounces tragedy He praised the law enforcement agencies to respond quickly.
Twitter chief executive Jack Dorset said that such incidents would not stop if only limited to responses.
"There is no need to worry about such things in school, in jobs and in our community centers so that thoughts and prayers are needed. Our policy is going to change, "said the reaction on Twitter.
Following a gun attack in Florida school in February, the YouTube authorities last month banned the sale of firearms and accessories, which prompted the ban on the post. They also announced the removal of those guns, which they were taught in the video.