Asbestos has been detected in at least three parks in Sydney's city centre, and an investigation is under way.

Authorities confirmed traces of asbestos were discovered in Harmony Park, Victoria Park, and Belmore Park- three popular public parks.

Australian correspondent Murray Olds says the friable asbestos identified is particularly dangerous, and the city council is 'apoplectic'.

 "It's very easily crushed, it can form dust and that releases little fibres that can get into your lungs and ultimately kill you."

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