“The attacker struck close to midnight, climbing into a manhole at the mouth of California’s Niles Canyon and slicing a series of cables that collectively carried billions of bits of Internet data.
Hundreds of miles away at a Zayo Group Holdings Inc. network operations center in Tulsa, Okla., engineers saw the disruption immediately and later a second break made further up the road the same February night. “
Source: Attacks on Fiber Networks in California Baffle FBI – WSJ