The leaders of Britain, France and Italy will push social media companies on Wednesday to remove "terrorist content" from the internet within one to two hours of it appearing because they say that is the period when most material is spread.
British Prime Minister Theresa May, French President Emmanuel Macron and Italian Prime Minister Paolo Gentiloni will raise the issue at an event on the sidelines of the annual gathering of world leaders at the United Nations.
Google will be represented by general counsel Kent Walker, who will also speak on behalf of a recently formed industry group called the Global Internet Forum to Counter Terrorism.
Facebook is sending Monika Bickert, head of global policy management, who is expected to make remarks reiterating the companies' commitment to combating online extremism.
Microsoft is sending Dave Heiner, a senior policy advisor.