A swimmer has died after suffering "catastrophic injuries" in a shark attack off a Sydney beach, police and ambulance services said.
Local media said it was the first fatal shark attack in Sydney since 1963.
Emergency services were called to Buchan Point, Malabar, in Sydney's east, NSW police said.
They said the Little Bay Beach has been closed.
"Officers attached to Eastern Beaches Police Area Command,with assistance from the Marine Area Command and Surf Life Saving NSW, attended and located human remains in the water," police said.
The police offered no information about the identity of the swimmer.
A NSW Ambulance spokeswoman said paramedics were called to Little Bay, "unfortunately this patient had suffered catastrophic injuries and there was nothing paramedics could do."
Police said they would work with the state's Department of Primary Industries to investigate the circumstances of the swimmer's death.
A report would be prepared for the state coroner.
There were three fatal shark attacks across Australia last year, including two in New South Wales, according to a database compiled by the Taronga Conservation Society.
No fatalities had been recorded so far in 2022.
Police urged beachgoers to follow safety guidance from Surf Life Saving NSW.
The organisation advises people to swim only in patrolled areas on the beach, avoid swimming at dawn, dusk and night, steer clear of schools of baitfish and keep away from river mouths or murky water.
A SharkSmart app provided by the New South Wales government alerts swimmers and surfers in real time when a shark is detected nearby.
New South Wales relies on a string of listening stations, drumlines, shark nets and shark-spotting drones to protect people in the water.
