Australian Prime Minister Anthony Albanese announced a national firearms buy-back scheme to remove surplus, newly banned, and illegal guns following the Bondi Beach massacre.

The scheme, funded jointly with states and territories, aims to collect and destroy hundreds of thousands of firearms, with state authorities handling collection and payments and federal police responsible for destruction.

A day of reflection for the victims will be held on December 21, with flags at half-staff, and a national day of mourning is planned in the new year.

Albanese confirmed the attack was ISIS-inspired, based on intelligence from online video feeds, and said investigations into the motivation and methods are ongoing, CNN has reported.

The initiative is Australia’s largest gun buy-back since 1996, reflecting concerns that the country now has over four million firearms, more than during the Port Arthur massacre.