Over 2000 local computer systems affected
A strain of a computer malware, known as HDDCryptor, hit 2,112 computers within the San Francisco Municipal Transportation Agency, according to correspondence with the ransomware's masters. This has affected the railway system starting on Friday evening, continuing throughout Saturday, and as of Sunday night, there has been no news of a resolution. https://cointelegraph.com/news/san-francisco-subway-is-free-to-use-after-ransomware-attack-hackers-sought-bitcoins