https://www.eastbaytimes.com/2020/01/03/ransomware-attack-hits-contra-costa-library-system/

MARTINEZ — The Contra Costa County Library System was working to assess the extent of possible exposure after reports of an apparent hack and ransomware attack, authorities said Friday.

A Facebook post late Friday morning initially said the library system “is experiencing a network outage and services at all 26 branches are impacted. Library materials can be checked out if you bring your library card to the branch.”