Ammon News - Mysterious green, grey and black balls have washed up on a beach in Kurnell, in Sydney’s south, with beachgoers warned to avoid the area.

Authorities said the “ball-shaped debris” washed up along the eastern end of Silver beach on Tuesday.

Sutherland Shire council was leading the clean-up after a local resident alerted the New South Wales Environment Protection Authority (EPA).

Council installed warning signs on the beachfront advising of the suspected contamination. Beachgoers were advised not to enter the beach until the clean-up was completed.

The Guardian