Zuckerberg San Francisco General Hospital

Paul Pelosi, husband of US House Speaker Nancy Pelosi, who was attacked using a hammer at his California home on Friday morning, has undergone surgery for a skull fracture and other severe injuries.

TheVerge - At least four people were shot at YouTube's headquarters in San Bruno on Tuesday, according to a police spokesman. Three victims were taken to local hospitals. A fourth person died at the scene, apparently of a self-inflicted gunshot wound, police said during a press conference Tuesday afternoon.