Australian authorities closed nine Sydney beaches today after mysterious white and grey balls washed up along the coast.
Beaches closed until further notice included tourist hotspots Manly and Dee Why, the city’s Northern Beaches Council said in a statement.
“So far, most samples identified are marble-sized with a few larger in size,” it said.
The local government said it was alerted to the debris by the Environment Protection Authority and was helping the state agency to collect samples for testing.