A New Zealand tech specialist says international regulation of social media companies is needed to reduce extremist online content.
On Saturday global leaders and tech companies will meet virtually to re-define The Christchurch Call.
It's the promise inititated by Jacinda Ardern to eliminate violent extremist content online made in the wake of the Christchurch mosque attacks in 2019.
Big tech firms including Amazon, Facebook, Google and Twitter all signed up to the pledge.
Technology commentator Paul Brislen spoke to Susie Ferguson.
