The coast seems to be clear after shark sightings Saturday and Sunday along the San Diego coastline.

San Diego Fire-Rescue spokesman Lee Swanson said no sharks were seen Monday after kayakers saw a hammerhead shark twice over the weekend.

On Saturday, the shark was circling and video was taken. Shark experts say the movement was aggressive so authorities closed a two-mile stretch of La Jolla Shores for 24 hours.

Another hammerhead was seen Sunday. Swanson said it was farther off shore so the beach was reopened with a warning to swimmers.

When no shark was sighted Monday, the warning was lifted.

Lee says there hasn't been a shark sighting in La Jolla Shores for about three years.