Theresa May will urge world leaders to do more to combat online extremism, saying the fight against so-called Islamic State is “moving from the battlefield to the internet”.
Speaking about counter-terrorism at the G7 summit in Sicily, the PM will say more pressure should be put on tech companies to remove extreme material.
They should report such content to the authorities, she believes.
Labour leader Jeremy Corbyn is to say the “war on terror” is not working.
Twenty-two people were killed and 116 injured when a suicide bomber targeted an Ariana Grande concert in Manchester Arena on Monday evening.