Facebook has announced curbs on its streaming feature ahead of an online extremism summit in Paris, called after the Christchurch mosque attacks.
The tech giant said there would be a “one-strike policy” banning those who violate new Facebook Live rules.
New Zealand Prime Minister Jacinda Ardern called the measures a “good first step”.
In March the gunman live-streamed the attacks in New Zealand, where 51 people died.
Ms Ardern will chair the summit with French President Emmanuel Macron. It aims to co-ordinate international efforts to stop social media being used to organise and promote terrorism.
Political leaders from Europe, Canada and the Middle East will meet senior representatives from companies such as Facebook, Google and Twitter, as well as issuing a joint “call to action” to eliminate terrorist material.