New South Wales Police said that nine people were killed in a shooting at Bondi Beach.
The service said at least 11 others are also injured, including two police officers.
One gunman has also been killed and a second is in critical condition, police said.
Prime Minister Anthony Albanese describes the scenes in Bondi as "shocking and distressing"
A Hanukkah event was taking part at the beach, but police say it is still unknown if the incident is connected to it.
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