Similar tweets you see above flooded Twitter as YouTube headquarters had an active shooter on the campus earlier today.
The shooter has now been identified as a woman by the name of Nasim Aghdam.
Nasim winded up injuring three people whom two are in critical condition and the third in fair conditon. Authorities are still investigating the situation but found out the suspect indeed knew one of the victims.
"We know very, very little right now, and we probably won't know more until tomorrow morning," says chief of San Bruno Police.
Another witness told CNN, there was three or four shots and later more shots.
He was in the drive-through line at a Carl's Jr. across the street from an end of the YouTube building where there are tables on the patio.
A woman had rushed over to the Carl's Jr. with a calf wound and people at the fast-food restaurant tried to use napkins to stop the bleeding.
The story is still developing but you can read more on it HERE