Gun 'epidemic' extends as transit worker kills 9

A public transit worker shot dead nine co-workers at a California rail yard on Wednesday before turning the gun on himself as police arrived, officials said of the latest mass shooting to hit the United States.

This prompted the state's governor, Gavin Newsom, to ask, almost plaintively and in apparent exasperation: "What the hell is wrong with us?"

Several victims were also wounded in the attack at the rail yard in San Jose city, just south of San Francisco.