Great white shark sighting south of San Francisco prompts warning

A great white shark sighting in Half Moon Bay on the California coast prompted a warning Saturday afternoon to swimmers, The Mercury News reported.

Someone reported seeing the shark a quarter-mile south of Pillar Point Harbor at 1:15 p.m., KGO reported.

No information on the size of the shark was available, according to KNTV.

San Mateo County officials warned swimmers in the area to exercise caution, KPIX reported.

Half Moon Bay is about 30 miles south of San Francisco.

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Don Sweeney has been a newspaper reporter and editor in California for more than 25 years. He has been a real-time reporter based at The Sacramento Bee since 2016.