Australian authorities have closed nine beaches in Sydney due to mysterious balls washing up from the ocean. These balls, consisting of an unknown substance, appeared on the beaches on Tuesday morning.

Australian authorities closed nine Sydney beaches on Tuesday after mysterious white and grey spherical objects washed up along the coast.

The mysterious balls that forced the closure of several beaches in Sydney last week were found to contain saturated acids, E. coli and faecal bacteria, authorities say. Sydney's Northern Beaches council said it has sent the debris to the New South Wales Environment Protection Authority (EPA) for further analysis.

Mysterious polluting spheres that closed nine northern beaches contain similar contents to the “tar” balls that appeared across the eastern suburbs last year, according to preliminary test results released on Monday.

Locals were urged to steer clear of a number of beaches by the Northern Beaches Council while they clean up the debris and send it for testing. | ITV National News

Swimmers and surfers were urged out of the water on Tuesday afternoon after the white-grey, ball-shaped debris was found along Sydney's northern beaches.

Sydney: Australian authorities closed nine Sydney beaches on Tuesday after mysterious white and grey balls washed up along the coast. Beaches

Sydney’s pumping of primary-treated effluent into the ocean makes us out of step with the rest of the world, a water engineering expert said.

Several popular beaches in Sydney, including Manly and Dee Why, were closed recently due to the sudden appearance of mysterious small balls washing ashore. Also read Mysterious Balls Close Sydney Beaches Once Again as Authorities Investigate Now the Northern Beaches Council confirms that the balls contained saturated acids,