The city of Knoxville, Tennessee, has shut down its computer network following a ransomware attack. The attack took place in the night between June 10 and June 11, the malware encrypted multiple systems in the IT network. According to Chief Operations Officer David Brace, the attack has been discovered by employees of the city’s fire department around 4:30 AM, June 11. Brace said The Tennessee Bureau of Investigation and the Federal Bureau of Investigating is investigating into the incident.