FBI investigating 11 physical attacks on internet fiber optic cables in San Francisco-area dating back a year, including one Tuesday on Level 3 and Zayo
FBI investigating 11 attacks on San Francisco-area Internet lines — The FBI is investigating at least 11 physical attacks …
Context & Ripple Effects
A year of unexplained cuts to Bay Area fiber lines has finally drawn a federal investigation, with Level 3 and Zayo among the operators hit. The case fits a recurring pattern in the related coverage: perpetrators surgically cut backbone cables around Paris in about two hours in April 2022, and analysts have long argued that human damage to cable networks is more targeted — and less random — than military planners warn, since even the ~428-cable undersea system sees one break every couple of days, often by nature.
Why it matters now: most carrier security spending and government guidance targets hackers, not someone with wire cutters. The FBI and CISA's hardening best practices for US telcos were written for network intrusion; eleven separate physical cuts suggest the physical layer needs its own playbook.
First-order effects
- Level 3 and Zayo must repair damaged trunk lines while absorbing the cost of rerouting traffic around cut segments for their Bay Area customers.
- The FBI inherits a year-long, multi-site case spanning at least 11 incidents, shifting what was treated as local vandalism into a federal criminal inquiry.
Second-order effects
- Carriers face pressure to add physical monitoring, locked vaults, and route diversity on shared conduit — spending that competes with capacity investment, much as the Paris cuts forced European operators to reassess single-point chokepoints.
- Insurers and enterprise buyers of dark fiber begin pricing geographic concentration risk, favoring providers whose paths don't share the same manholes.
Third-order effects
- If coordinated cutting recurs across regions, physical infrastructure protection moves from a municipal nuisance issue to a national-security category alongside cyber defense, with FBI and CISA guidance likely extended from software hardening to field assets.
- Backbone topology becomes a resilience metric in its own right: operators with redundant, geographically separated routes gain a durable competitive edge over cheaper single-path builds.
The trend: Physical sabotage of internet backbone infrastructure is re-emerging as a distinct attack surface that sits largely outside the cyber-focused defenses carriers and governments have built.