https://www.cnet.com/news/fake-news-on-youtube-shooting-spreads-on-twitter-reddit-others-despite-recent-efforts/

Every major social network has its own challenges with disinformation. They've enacted series of algorithmic and structural changes in order to combat its spread. Just as Tuesday's shooting raged, Facebook said it was scrubbing more than 270 pages linked to a Russian troll farm.

Police say three victims in the shooting in San Bruno, California, have been transported for emergency treatment and the suspected female shooter was found dead from what they believe to a self-inflicted gunshot wound. The headquarters has been evacuated and law enforcement officers are continuing to investigate.