Australian environmentalist and television personality Steve Irwin has died during a diving accident.
Mr Irwin, 44, was killed by a stingray barb to the chest while he was filming an underwater documentary in Queensland's Great Barrier Reef.
Paramedics from the nearby city of Cairns rushed to treat him at the scene but were unable to save him.
Mr Irwin was known for his television show The Crocodile Hunter and his work with native Australian wildlife.
Police in Queensland confirmed the naturalist's death and said his family had been notified. Mr Irwin was married with two young children.
"It is believed that Mr Irwin collapsed after being stung by a stingray at Batt Reef off Port Douglas at about 1100 (0100 GMT)," a police statement quoted by AFP news agency said.
"His crew called for medical treatment and the Queensland medical helicopter responded. However Mr Irwin had died."