Reports of shark sightings off Coronado Beach led the city to issue warnings to the public Friday to be aware of potential activity in the waters.
The sightings were reported to lifeguards Thursday between 5:30 p.m. and 7 p.m., according to a statement from the city.
Initial reports from witnesses indicated they saw four sharks, ranging from six to 10 feet in length. A lifeguard using a personal watercraft also observed a shark, according to the city.
The sharks were reported within about 40 yards of the shore in the South Beach area, according to the city. As a result, warning signs have been posted along the beach, per city protocol, and the Coronado Fire Department advised beachgoers to swim in areas near staffed lifeguard towers.