Officials added Aghdam had previous California addresses in Riverside and San Diego.
READ MORE: Aghdam allegedly posted manifesto targeting YouTube's policies
Police said the woman went to the San Bruno, California complex and started firing. Three people were wounded.
The apparent shooter was found dead with an apparent self-inflicted gunshot.
Authorities did not immediately give details on Aghdam's connection to YouTube or any of the victims.
Two federal law enforcement officials told ABC News early indications point to the shooting being the result of a domestic situation.
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The headquarters was evacuated shortly after the shooting and as officers swarmed the complex. San Bruno police reported receiving multiple 911 calls of the shooting at around 12:46 p.m. PT.
ABC News was in touch with employees who said they heard multiple gunshots. Those workers barricaded themselves after the initial shots. Many of those employees got out and were very shaken up, ABC reports.
Police earlier advised people to stay away from the area.
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ATF is also responding to the scene.
San Francisco General Hospital, a trauma center, reported receiving patients from the "YouTube" incident. The hospital listed the following patients from the scene:
- 32-year-old woman in serious condition
- 27-year-old woman in fair condition
- 36-year-old man in critical condition
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Google, the parent company of YouTube, also confirmed an active investigation at the video website campus.
Aerial images over the campus show law enforcement approaching the building with guns drawn. Employees are seen being evacuated with arms overhead, and the campus is flanked with dozens of police cars and emergency vehicles.