California: A woman opened fire at YouTube headquarters in San Bruno, California, shooting three people with a handgun before taking her own life and causing widespread panic in the technology hub south of San Francisco.The case is being investigated as a domestic disputeAccording to Reuters, the shooter was targeting her boyfriend. Of the three injured, one is in critical condition. The shooter has not been identified. A law enforcement source identified the alleged shooter as Nasim Aghdam.

Investigators initially believed the shooting was a domestic incident, with the shooter targeting someone who worked on the YouTube campus.

The headquarters at San Bruno, which hosts nearly 2,000 employees, is spread across several buildings. The incident reportedly occurred on a patio outside, near the dining courtyard.

The victims include a 36-year-old man in critical condition and two other women, ages 32 and 27. According to an eye-witness, the shooter wore glasses and a scarf.

US President Donald Trump has reportedly been briefed on the incident, now contained. Officials at the White House are monitoring developments.

Google CEO Sundar Pichai said there are no words to describe the tragedy. “There are no words to describe the tragedy that occurred today. @SusanWojcicki & I are focused on supporting our employees & the @YouTube community through this difficult time together. Thank you to the police & first responders for their efforts, and to all for msgs of support,” he said.

Susan Wojcicki, the CEO of YouTube, said the company will heal as a family. “There are no words to describe how horrible it was to have an active shooter @YouTube today. Our deepest gratitude to law enforcement & first responders for their rapid response. Our hearts go out to all those injured & impacted today. We will come together to heal as a family,” she tweeted.