After talks with British Prime Minister Theresa May in Paris, French President Emmanuel Macron said both countries agreed that social networks were not doing enough to stamp out terror propaganda.
Speaking after terror attacks in Manchester and London, Macron said the two countries had worked on a "very concrete" action plan.
He said one of the key measures would aim at preventing the incitement of "hate and terrorism" on the internet.
May said she and Macron agreed that "more should be done to tackle the terrorist threat online".
She said the British and French campaign was aimed to "ensure the internet cannot... be used to host the radicalising material that leads to so much harm."

