Sydney and other parts of New South Wales were hit by fast moving storm, with thunder, lightning, heavy rains and winds that left some suburbs blacked out. This footage illustrates severe storm with lightning flashes,

Footage shows a dramatic lightning storm above the Sydney Olympic Park in New South Wales, Australia, as at least one person was killed in the storm. Officials said that an unstable airmass combined with an upper trough produced wild weather across large swathes of the state late Wednesday.

The discovery of the marble-sized balls comes after a similar incident in October closed Sydney's Bondi Beach, among other tourist hotspots.