SYDNEY (DPA)

Sydney beaches, including the world-famous Bondi Beach, have been repeatedly closed over the past four days following a series of shark sightings off Australia's largest city, authorities said on Friday.

Lifeguards and drones spotted sharks again on Friday morning near Tamarama and Bronte beaches in Sydney's eastern suburbs, according to the New South Wales government's SharkSmart platform.

Swimmers were barred from entering the water while authorities continued to monitor conditions.

Footage from Drone Shark App showed what appeared to be a great white shark near Bondi Beach, a popular destination for surfers and international tourists.

Other potentially dangerous shark species were also reportedly sighted in the area.

On Thursday, surfers were ordered via loudspeakers to leave the water after a shark was detected nearby.

The heightened alerts come two weeks after a serious shark attack at nearby Coogee Beach, where a 35-year-old woman suffered life-threatening injuries and had her arm amputated.

Her condition has since improved, with family members saying she is no longer in life-threatening danger and is awake and responsive, the Sydney Morning Herald reported.