A bystander captured on video tackling and disarming an armed man during an attack in Sydney on Sunday is being hailed as a hero whose actions potentially saved lives.

Twelve people were shot dead at a Jewish holiday event at Bondi Beach.

Footage circulating on social media, which has been verified by CBC News, shows a man in a car park wearing a white shirt running up to a man in a dark shirt who is holding a rifle. He then tackles the armed man from behind, wrenching the rifle from him with his hands before pointing the gun back at the man.

The video then shows the man in a dark shirt losing his footing, backing away toward a bridge where another shooter was located, while the bystander places the gun down on the ground.

Hanukkah shooting at Australia's Bondi Beach that killed at lea

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