A 17-year-old boy has been charged over a threat made on social media that led to the evacuation of the Sydney Opera House.
New South Wales Police said the threat was made about 10:50am last Thursday.
The Opera House and forecourt were cordoned off for more than two hours and searched, but police found nothing of interest.
Officers also went to the Manly wharf after getting information that those responsible for the threat may have been on a ferry.
One ferry service was cancelled and a second delayed as a result of the police operation.
Police arrested the teenager at Sydney City Police Station on Monday following an investigation by officers.
He has been charged with false representation resulting in a police investigation and is due to appear at a Children’s Court on February 23.
Police said the two operations were conducted as a “precautionary measure”.