YouTube shooting people leaving hands up Nasim Aghdam.ReutersVideo footage shows people leaving YouTube's headquarters with their hands up.

On Tuesday afternoon Nasim Aghdam opened fire at YouTube's headquarters in San Bruno, California.

She shot three people - though none fatally - and was found dead of a self-inflicted gunshot wound to the chest.

Here, moment by moment, is how the event unfolded.

This post will be updated as more information emerges.

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April 2, 2018: Nasim Aghdam is reported missing from her hometown of San Diego, California. Her father is worried she may be heading for YouTube HQ, and tells police.

April 2, 2018: Nasim Aghdam is reported missing from her hometown of San Diego, California. Her father is worried she may be heading for YouTube HQ, and tells police.

April 3 2018, around 2 a.m.: Police find Aghdam asleep in her car in Mountain View California, speak to her, and let her go.

April 3 2018, around 2 a.m.: Police find Aghdam asleep in her car in Mountain View California, speak to her, and let her go.

Officers recognised Aghdam's plates from the missing person report. They spoke to her but ultimately chose to leave her alone.

It is unclear whether they knew about the warning from her father. Mountain View is half an hour's drive from San Bruno.

12:46 p.m.: San Bruno police receive the first 911 calls from people at YouTube HQ reporting gunshots.

12:46 p.m.: San Bruno police receive the first 911 calls from people at YouTube HQ reporting gunshots.

3:14 p.m.: Surgeons at Zuckerberg San Francisco General Hospital say the three victims are being treated, and their injuries range from "critical" to "fair."

3:14 p.m.: Surgeons at Zuckerberg San Francisco General Hospital say the three victims are being treated, and their injuries range from "critical" to "fair."

Information is still emerging about the shooting. Police say the next major update will come at on April 4 at 9 a.m. San Francisco time.

 

The next press conference is scheduled for 9am tomorrow morning outside of the San Bruno Police Department, 1177 Huntington Ave.

— San Bruno Police (@SanBrunoPolice) April 4, 2018