The Sydney Opera House precinct has been reopened to the public after a police operation caused staff and tourists to be evacuated from the iconic landmark.
Police simultaneously conducted an operation across the harbour in Manly as a precautionary measure following information on social media.
The forecourt of the Opera House was cleared at around 2pm with police erecting metal barriers.
Employees at the Sydney Opera House and Opera Bar calmly left the building.
A Sydney Opera House tour guide said she had been leading tourists around the building when police arrived.
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"My tour was stopped mid tour... now I can't get back in," she told AAP.
Tourists milled around the area and took selfies despite security guards and police officers asking them to move on.
The Opera House's Bennelong Restaurant is still taking bookings for Thursday night and performances at the Sydney Opera House will also proceed as planned.
