Sydney, Australia (AFP) – Hundreds of mysterious black tar-like balls have washed up on two popular Sydney beaches, prompting lifeguards to close the strands to swimmers.

“Mysterious, black, ball-shaped debris” began appearing on Coogee Beach on Tuesday afternoon the local mayor said, leaving flummoxed Australian authorities scrambling to find out what they might be, and where they may have come from.

Hundreds of golf-to-cricket-ball-sized spheres could be seen littering the coast, which is usually thronged with Sydneysiders and tourists.

Instead, a few seagulls wandered among the spheres, pecking and examining.

The balls were also spotted at nearby Gordon’s Bay, an aquatic reserve popular for snorkelling and fishing, which was also closed.

“At this stage, it is unknown what the material is,” Mayor Dylan Parker said in a social media post.

“However, they may be ‘tar balls’ which are formed when oil comes in to contact with debris and water, typically the result of oil spills or seepage.”

arb/ssy

© Agence France-Presse

Featured image credit: kjpargeter | Freepik

Image: Nodule Collector
Key facts on deep-sea miningFacts

Key facts on deep-sea mining

Oslo, Norway | AFP | Muser NewsDesk Supporters see deep-sea mining as a boon for the green energy transition, while opponents see it as an…
SourceSourceApril 29, 2025 Full article
Image: Map of new zealand, gold glitter map on dark background
New Zealand accused of ‘climate denial’ over new methane targetsNews

New Zealand accused of ‘climate denial’ over new methane targets

Wellington, New Zealand | AFP Environmental campaigners have accused New Zealand's government of "full-blown climate denial" after it slashed targets for reducing emissions of methane, a…
SourceSourceOctober 13, 2025 Full article
Group of penguins in Antarctica (s. Antarctic sea ice)
Antarctic sea ice improves after four years of extreme lows: US scientistsNews

Antarctic sea ice improves after four years of extreme lows: US scientists

Paris, France | AFP | Muser NewsDesk Antarctic sea ice coverage has likely rebounded this year, coming closer to its annual summer average after four years…
SourceSourceMarch 9, 2026 Full article