By Christine Chen

SYDNEY, Dec 14 (Reuters) - A bystander captured on video tackling and disarming ​an armed man during an attack in ​which 12 people were shot dead at a Jewish holiday event at Sydney's Bondi Beach ⁠on Sunday has been hailed as a hero whose actions potentially saved lives.

Footage circulating on social media 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........

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