The United States is joining the fight to eliminate terrorist and extremist content online, being driven by New Zealand and France.
The next Christchurch Call summit, co-chaired by New Zealand Prime Minister Jacinda Ardern and French President Emmanuel Macron will be held as a video conference on Saturday with the participation of the US, the two leaders said in a joint statement.
"The US Government's support recognises the importance of a multi-stakeholder approach to an issue that increasingly transcends borders, ideologies and nationalities, and the ability of any one group or country to address on their own," Ms Ardern said.
"It also recognises the importance of protecting human rights and fundamental freedoms online."
"The pervasive threat of terrorist and hateful content online continues to contribute and fuel violent extremism and terrorist actions," the French president said. "We believe the Call remains a cornerstone of our collective efforts against the presence online of such content."
The first summit was held two years ago, bringing in tech companies including Facebook, YouTube and Google, after a man broadcast the killings of 51 people at two mosques in Christchurch.
The shooter live-streamed the massacre for 17 minutes before Facebook removed the stream. Clips then rapidly spread online.
France has suffered multiple terrorist attacks in recent years.
Australian Associated Press