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SYDNEY, Australia (CNN) -- Steve Irwin, the Australian TV presenter known as the "Crocodile Hunter," has died after being stung in a marine accident off Australia's north coast.

Australian media reports say Irwin was diving in waters off Port Douglas, north of Cairns, when the incident happened on Monday morning.

Irwin was killed by a stingray barb that went through his chest, according to Cairns police sources. Irwin was filming an underwater documentary at the time.

Ambulance officers confirmed they attended a reef fatality Monday morning off Port Douglas, according to Australian media.

Queensland Police Services also confirmed Irwin's death and said his family had been notified. Irwin, 44, was director of the Australian Zoo in Queensland.

He and his American-born wife Terri Irwin became popular figures on Australian and international television through Irwin's close handling of wildlife, most notably the capture of live crocodiles.

They have two children, Bindi Sue, born 1998, and Robert (Bob), born December 2003.

Irwin's enthusiastic approach to nature conservation and the environment won him a global following. He was known for his exuberance and use of the catchphrase "Crikey!"

But his image suffered a setback in January 2004 when he held his then one-month-old baby Bob while feeding a crocodile at his Australian zoo.

Irwin's wife Terri was believed to be on location in Tasmania, filming another documentary.

Australian Foreign Minister Alexander Downer expressed his sorry Monday and said that he was fond of Irwin and was very appreciative of all the work he had done in promoting Australia overseas.

[[how sad, he took so many risks and that's how he died......]]