Afternoon Update: mystery debris closes more Sydney beaches; tennis NFTs shed value; and Trump’s inauguration headliners

Manly beach is one of nine areas closed to swimmers after debris washed ashore. Photograph: Matthew Smeal/The Guardian

Nine of Sydney’s northern beaches have been closed after “marble-sized” debris washed ashore. Manly, Dee Why and North Narrabeen are among the spots off limits to beachgoers until further notice.

The Northern Beaches mayor, Sue Heins, said the balls “could be anything”, and that was making the coastal mystery “even more concerning”.