Oliver Peterson: Australian correspondent on the arrest of the Croydon Park shooter - Heather du Plessis-Allan Drive

A 60-year-old man's been arrested in Sydney, after a gunman opened fire in the suburb of Croydon Park last night.

At least one person was hit and seriously injured - and 16 hurt - with up to 100 shots fired between 7.45 and 9.30pm.

Australian correspondent Oliver Peterson says the shooter's motivation remains unknown, but investigations are still ongoing. 

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