Oliver Peterson: Australian correspondent on Sydney underworld figure Tarek Ayoub being shot and killed in Parramatta - Heather du Plessis-Allan Drive

A prominent Sydney underworld figure has been shot and killed in a targeted murder, according to authorities.

Tarek Ayoub was shot multiple times in the car park of a unit complex in Parramatta - and was pronounced dead on the scene.

Australian correspondent Oliver Peterson says police are worried about retribution from other Sydney gangs.

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