A 12-year-old boy was critically injured in a shark attack in Sydney Harbour, leading to police warnings for people to avoid swimming in the area.
The boy was bitten on Sunday afternoon near Shark Beach at Nielsen Park and remains in critical condition with severe leg injuries.
His friends bravely pulled him from the water, and police officers applied tourniquets and performed CPR, which authorities described as a 'textbook recovery'.
Police and fisheries officials believe heavy rain and murky, low-visibility water created a 'perfect storm' for the attack, likely by a bull shark.
Two further shark incidents occurred across Sydney beaches within 24 hours, involving an 11-year-old boy whose surfboard was bitten and a man critically injured at Manly Beach.