AT&T said Friday morning that service had been completely restored to all affected areas, after suspected saboteurs clipped several high-speed fiber-optic cables sometime Wednesday or early Thursday morning.

AT&T said Friday morning that service had been completely restored to all affected areas, after suspected saboteurs clipped several high-speed fiber-optic cables sometime Wednesday or early Thursday morning.

AT&T continued to send out updates via Twitter, stating Friday morning that "Repairs to vandalized San Jose cables were completed overnight. Services are operating normally this morning." A partial restoration of services was completed on Thursday night, including 911 emergency services, AT&T said.

AT&T also said that it would offer $100,000 for the arrest and conviction of those responsible for what the company referred to as "vandalism". Those with information can call 408-947-STOP, AT&T said.

The outage affected thousands of users in the San Jose and Santa Clara areas of Silicon Valley, cutting off both landlines and cellular service, including services like Verizon, which used the fiber-optic cables as a backhaul. City officials were advising residents with medical emergencies to drive themselves to the hospital, as the 911 emergency services were also taken down by the cuts.

Four cables were cut on Monterey Highway north of Blossom Hill Road in south San Jose, police Sgt. Ronnie Lopez told SFGate.com, and two more were severed in San Carlos.