Lifeguards scrambled to get everyone out of the water after a 10-foot hammerhead shark was seen circling kayakers at a San Diego County beach in California.
A 1.5-mile stretch of beach from La Jolla Cove to Scripps Pier was closed Saturday afternoon after a confirmed sighting of the shark.
San Diego Fire-Rescue spokesman Lee Swanson said the shark appeared to be acting aggressively toward a group of kayakers and followed them into shore.
Lifeguards reviewed a video taken by a kayaker of the shark and ordered the beach closed.
A marine biologist at the nearby Scripps Institution of Oceanography confirmed that the size, species and behavior of the shark warranted the closure.
Swanson said there have been no additional sightings.