Great white sharks swimming near California beach prompt officials to issue advisory

Southern California authorities are warning beachgoers after three juvenile great white sharks were spotted on Friday. 

San Diego-Fire-Rescue posted an advisory warning swimmers to enter the waters by Blacks Beach at their own risk.

The sharks were seen by lifeguards patrolling in a boat about 100 yards from shore at around 12:15 p.m. PT.

The sharks were six, eight and nine feet in length and were feeding on the carcass of a sea lion. 

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They were not exhibiting any aggressive behavior.

"State lifeguards were notified because of proximity and signs were posted along the beach a mile in each direction from where the shark...