An internet outage in the San Francisco area that led to concerns about a targeted malicious attack has been described as "vandalism" by the FBI.
The outage is affecting Wave Broadband customers, many of whom have taken to Twitter to voice their concerns about their lack of connectivity.
The firm admitted to the problem on its support pages, suggesting that the company was the victim of a "coordinated attack on multiple carriers".
"Three major fibre cables connecting the region have been physically severed in what appears to be a coordinated attack on multiple internet carriers beginning at 4:20am Tuesday morning," Wave said.
"Crews from the major carriers are on the scene making repairs, but no ETA is available at this time."
A report on Reuters said that Wave traced the problem to cables operated by two firms, Level 3 and Zayo. V3 has asked each to comment.
Reuters confirmed with Wave that the problem is limited to suburban areas of Sacramento, adding that the FBI is looking at the attack in the context of similar cable cutting incidents.
Local news site CBS Sacramento said that a statement released by the FBI looks to cool such reports, and explains that the incident is down to vandalism. V3 has contacted the FBI for more information.
"The Sacramento field office of the FBI seeks to clarify a statement made by an internet service provider regarding a service outage reported during the morning hours of today, 30 June 2015," a representative of the local FBI office told CBS Sacramento.
"Despite the impact to customers in a variety of service areas in northern California, the vandalism which resulted in the reported outages was confined to a single geographic location in the San Francisco Bay area."
Wave Broadband has updated its support information to show that services have been restored.
"The disruption to service in the Sacramento and Rocklin markets due to the fibre cut of several partner carrier providers has been resolved," the company said.
"As of about 11:40pm Tuesday night, phone, TV and internet services are operating normally."
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