9 Sydney beaches closed after mysterious ball-shaped debris washes up ashore

Nine beaches in Sydney, Australia, have been closed after mysterious gray debris shaped like small balls washed up ashore.

The discovery of the marble-sized balls comes just months after a similar incident in October of last year, where thousands of washed-up black balls led to the closure of Bondi Beach, among other tourist hotspots.

In a Facebook post, the local council for the Northern Beaches region warned the public to avoid Manly, Dee Why, Long Reef, Queenscliff, Freshwater, North and South Curl Curl, North Steyne and North Narrabeen beaches.