Australians on Sunday hailed a man whose intervention during a mass shooting at Sydney’s Bondi Beach helped stop an armed attacker, who may have saved many lives during the country's worst mass shooting in years.

He even earned a shout-out from U.S. President Donald Trump, who said the man's brave actions "saved a lot of lives" during a shocking assault on a Jewish gathering to celebrate Hanukkah.

Following the deadly shooting on Sydney's Bondi Beach, footage emerged on social media of a man risking his own life by grabbing one of the gunmen as he fired on people who were out of view of the recording.

The man then wrestles the gun out of the attacker's hand, before pointing the weapon at the assailant who backs away.

Local outlet 7News identified him as 43-year-old Ahmed al Ahmed, a fruit seller, and reported he had suffered two gunshot wounds.