https://www.bleepingcomputer.com/news/security/fbi-telephony-denial-of-service-attacks-can-lead-to-loss-of-lives/

The Federal Bureau of Investigation (FBI) has warned of the harsh consequences of telephony denial-of-service (TDoS) attacks and has also provided the steps needed to mitigate their impact.

The FBI published this warning on Wednesday as an IC3 public service announcement and as a Private Industry Notification issued to private sector organizations in coordination with DHS-CISA.