Ten people have been confirmed dead, including a man believed to be one of the shooters at Bondi Beach.

A second shooter is in critical condition.

Sydney police said casualty numbers are expected to change as the operation continues.

A further 11 people have been reported injured, including 2 police officers.

Emergency services were called to Campbell Parade at about 6.45pm on Sunday, following reports shots had been fired.

Officers from Eastern Suburbs Police Area Command attended, assisted by multiple resources from across the city.

A number of suspicious items found nearby have been examined by specialist officers, and an exclusion zone has been put in place.

Police have urged the public to continue avoiding the area.

A multiagency response has remained ongoing, with an extensive crime scene established as investigations continue.

Police have confirmed there have been no reports of any other incidents in Sydney connected to the shooting.

Police are appealing for anyone with mobile phone footage or dashcam vision related to the incident to contact Crime Stoppers on 1800 333 000.

Information can also be provided at nsw.crimestoppers.com.au and is managed on a confidential basis. The public has been reminded not to report information through NSW Police social media pages.

Hundreds of people were seen fleeing the scene at about 6.40pm on Sunday and video has shown two men wearing black clothes shooting guns near the beach carpark.

In another video, extraordinary footage showed a bystander confronting one of the shooters, tackling him and taking the rifle from him.

Prime Minister Anthony Albanese has convened the National Security Council in the wake of the Bondi Beach massacre.

The national terror threat level had been set as “probable”, meaning there was a 50 per cent or greater chance of a terror attack.