The San Francisco Chronicle reported:
This appears to have been an act of cyber-terrorism. Perhaps it was a practice run for bigger operations. If an enemy wanted to sow chaos in our society, knocking out the internet and phone lines would seem an effective strategy.
Ten fiber-optic cables were cut at four locations in the predawn darkness. Residential and business customers quickly found that telephone service was perhaps more laced into their everyday needs than they thought. Suddenly they couldn't draw out money, send text messages, check e-mail or Web sites, call anyone for help, or even check on friends or relatives down the road.
Several people had to be driven to hospitals because they were unable to summon ambulances. Many businesses lapsed into idleness for hours, without the ability to contact associates or customers.
More than 50,000 landline customers lost service - some were residential, others were business lines that needed the connections for ATMs, Internet and bank card transactions.
This morning all services appear to be restored and functioning.