The leaders of Britain, France and Italy would push social media companies on Wednesday to remove “terrorist content” from the internet within one to two hours of it appearing.
This was believed to be the period when most of such material is spread.
British Prime Minister Theresa May, French President Emmanuel Macron and Italian Prime Minister Paolo Gentiloni will raise the issue on the sidelines of the UNGA.
Internet companies including Facebook Inc, Microsoft Corp Alphabet Inc’s Google said they will attend the meeting.
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.
The European Union has threatened legislation if internet companies do not step up efforts to police what is available on the web.
The British UN mission said May will welcome progress, but urge companies to go “further and faster” to stop groups like Islamic State spreading material that promotes extremism or shows how to make bombs or attack pedestrians with vehicles.
“Terrorist groups are aware that links to their propaganda are being removed more quickly, and are placing a greater emphasis on disseminating content at speed in order to stay ahead,” May plans to tell the event.
“Industry needs to go further and faster in automating the detection and removal of terrorist content online and developing technological solutions which prevent it being uploaded in the first place,” she will say.
Responding to pressure from governments in Europe and the United States after a spate of militant-attacks, key firms created the Global-Internet-Forum to Counter-Terrorism in June.
The forum is to share technical solutions for removing extremist content and works more with counter-terrorism experts.
Twitter said it had removed 299,649 accounts in the first half of this year for the “promotion of terrorism”, a 20 per cent decline from the previous six months.
“We need a fundamental shift in the scale and nature of our response – both from industry and governments – if we are to match the evolving nature of terrorists’ use of the internet,” May said.