“A state of emergency announcement has been issued,” Cantrell wrote on her Twitter account.

A declaration of a state of emergency has been filed with the Civil District Court in connection with today's cyber security event. pic.twitter.com/UtpGtu2aNm

- Mayor LaToya Cantrell (@mayorcantrell) December 13, 2019

It is noted that the computers used by the city authorities were attacked by ransomware viruses.

On July 20, hackers managed to hack into Scotland Yard's email inbox.