***Update*** It has been confirmed that the shooter is a white, adult female wearing a dark top and head scarf. At least one person is confirmed dead while 4 other victims have been transported to neighboring hospitals.
There are numerous reports on Twitter from employee's at YouTube in San Bruno, Ca that there is an active shooter. Employees have barricaded themselves in their offices as police are responding.
Swat teams stormed the building and terrified workers claimed there was a female shooter who had gone on a rampage around the offices.