UPDATED: This timeline shows exactly how the YouTube shooting unfolded

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.

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.

Nasim Aghdam in a screenshot from her website. NasimeSabz.com

April 3, 1:40 am.: Police in Mountain View, California, find Aghdam asleep in her car in a parking lot. They speak for 20 minutes.

A parking lot around the location officers said they found Aghdam asleep in her car. Google Street View

2:00 am.: Officers leave Aghdam. They said she was “calm and cooperative” and told them she had no plans to hurt anybody. They let her family know where she is.

Business Insider has also published a fuller account of the parking lot exchange.

3:00 am.: Aghdam’s father returns a call from Mountain View police. He explained her apparent anger at YouTube, but “did not seem concerned” that anything bad may happen.

Later that morning: Aghdam drives from Mountain View to San Bruno. The precise time is unclear.


San Bruno police say Aghdam visited a “local” gun range before the attack, but did not say which one. Pictured below are search results for shooting ranges in the area.


After finishing at the range, Aghdam parked near YouTube HQ and entered the campus on foot via a parking garage.

Police run towards YouTube’s headquarters in San Bruno to confront the shooter. Skye Gould/Business Insider

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

12:48 p.m.: Police arrive and start searching the building.

12:57 p.m.: Word starts to get out. YouTube employee Vadim Lavrusik tweets that he is hiding from the shooter behind a makeshift barricade.

1:01 p.m.: San Bruno police post a tweet warning of “activity” around YouTube HQ, but do not yet describe it as a shooting.

1:05 p.m.: Business Insider first reports the shooting.


1:10 p.m.: YouTube product manager Todd Sherman tweets that other employees told him the shooter had already shot herself.


Sherman also describes seeing bloodstains on the floor and stairs of the building as he fled.


1:13 p.m.: 16 minutes after his first tweet, Lavrusik says he is outside and safe.

1:28 p.m.: San Bruno police tweet again, this time acknowledging an “active shooter” situation.

1:30 p.m.: Google acknowledges the shooting.

Around 2.18 p.m.: Lavrusik’s account is hacked and used to spread misinformation about the shooting.

Messages from Lavrusik’s account, which had previously posted true information about the shooting, wrongly named Daniel “Keemstar” Keem as a potential victim. In reality, he was not involved at all.

Business Insider’s Rob Price has written in more detail on hoaxes published around this shooting.

2:25 p.m.: Local TV news reports that the shooter is dead.

2:37 p.m.: Injuries are confirmed. Police initially say four people have gunshot wounds, this is eventually revised down to three.

2.49 p.m.: President Donald Trump sends his “thoughts and prayers” to those affected.


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

4:34 p.m.: Google CEO Sundar Pichai sent a letter to all Google employees describing the “unimaginable tragedy.”

6:19 p.m.: YouTube CEO Susan Wojcicki says the company “will come together and heal as a family.”

6:58 p.m.: Media begin to name Nasim Aghdam as the shooter, citing law enforcement sources.

10:26 p.m.: San Bruno police name Nasim Aghdam as the shooter and publish a photograph.

April 4, 2018, 4:07 p.m.: YouTube releases a statement clarifying that Nasim Aghdam accessed the premises through a parking garage, and reached an outdoor courtyard where the violence unfolded. She never made it inside the building, the statement said.

YouTube says it will increase security at all of its offices worldwide as a result of the incident.


“We are also revisiting this incident in detail and will be increasing the security we have at all of our offices worldwide to make them more secure not only for the near term, but long term,” the statement read in part.

“We want to express our deepest gratitude to the first responders, including the police, fire department, and medical teams. And a huge thank you also to the wider global community for their outpouring of support, well wishes, and words of togetherness.”

YouTube’s statement continued: “Your support reminds us that even in the toughest of times, the YouTube community comes together and supports one another.”