“When our deputies went through the door initially he was still firing rounds,” Santa Clara County Sheriff Laurie Smith told journalists.
Law enforcement officials identified the gunman as 57-year-old Samuel Cassidy and his ex-wife Cecilia Nelms revealed that Cassidy had told her that he wanted to kill his colleagues, but she had never believed he would do it.
Deputy Russell Davis, a spokesman for the Santa Clara County Sheriff’s Department, said “deputies did not exchange gunfire” with the suspect.
“Preliminarily, we’re going to go with the assumption it was a self-inflicted gunshot.”
Just before the shooting, a fire broke out at a home belonging to Cassidy, according to local media.
The Santa Clara Valley Transport Authority operates three train lines making up over 40 miles (65km) of rail. It also operates about 70 bus lines in the city.
Santa Clara is the largest county in California’s Bay Area and is home to Silicon Valley which encompasses several cities in Northern California including Cupertino, San Jose and Mountain View.
Speaking from near the crime scene, Governor Gavin Newsom condemned the “rinse and repeat” cycle of US mass shootings.
“What the hell is wrong with the United States of America? When will we put down our arms?” Governor Gavin Newsom said
In the same vein, US President Joe Biden called the attack a “horrific tragedy” and ordered flags to be flown at half-mast as he again urged Congress to take action on gun control.
“Every life that is taken by a bullet pierces the soul of our nation, we can and we must do more.” Biden said