SYDNEY, Dec 14 - 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.