A volunteer diver died during a search for an Oakland teenager who was last seen in the water at Lake Shasta.

The search for Robinson Sok, 18, started on Friday around 10:30 a.m. The teen, who had been on a houseboat with friends on the middle part of the McCloud Arm of the lake, had attempted to help a friend who had been swimming.

While going after the friend in distress, Sok apparently began to struggle as well. He went under water and did not resurface, according to Shasta County sheriff's officials.

Because this part of the lake is deep, divers were not initially used. Instead, a San Francisco Police Department dive team employed a remotely operated vehicle and a sonar system on Friday and Saturday.

As the search continued Saturday night, the vehicle became entangled, and a salvage diver attempted to retrieve it, according to the sheriff's office. That diver, Ken Smith, had to be pulled from the water by a sheriff's office dive team member. He was declared dead at a hospital.

The sheriff's team diver, John Zufall, was later flown to Travis Air Force Base near Fairfield where he was placed in a decompression chamber.

Zufall has worked for the sheriff's office for 12 years and been on the dive team for about 10 years. According to the sheriff's office, he is a certified advanced diver and was a diver in the U.S. Navy.

He is expected to survive.



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