Facebook has introduced new restrictions on live-streaming to tackle the sharing of graphic content after the New Zealand shooting was streamed online.
The social network's announcement comes as the Taoiseach and other world leaders gather in France in a bid to start tackling online extremism.
In March, a gunman in Christchurch killed 51 people in shootings at two mosques while live-streaming the massacre online.
Now, Facebook says it will restrict people who have 'broken certain rules' from using its live video service.
It's introducing a one strike policy for a 'broader range' of offences than before.
The social network gives the example of someone who shares a link to a statement from a terrorist group with no context - noting that such users will now be immediately blocked from using live features for a set period of time.
Facebook said in a statement: "We recognise the tension between people who would prefer unfettered access to our services and the restrictions needed to keep people safe on Facebook.
"Our goal is to minimise risk of abuse on Live while enabling people to use Live in a positive way every day."
It has also pledged to work with academics to research new ways of tackling edited videos and photos.
According to the company, the sharing of edited versions of the Christchurch attack video made it hard for systems to detect the videos - and the research will focus on addressing that.
Christchurch Call
(190402) -- BEIJING, April 2, 2019 (Xinhua) -- New Zealand Prime Minister Jacinda Ardern reacts during a briefing in Wellington, capital of New Zealand, on March 16, 2019. (Picture by Xinhua/Guo Lei)Meanwhile, Taoiseach Leo Varadkar will join other world leaders in Paris to discuss how to tackle the organisation and promotion of terrorism via online platforms.
New Zealand Prime Minister Jacinda Ardern and French President Emmanuel Macron are hosting the gathering.
The aim is to get countries and tech firms to formally agree to a pledge - dubbed the 'Christchurch Call' - to eliminate terrorist and extremist content online.
Ahead of the gathering, Ms Ardern welcomed the latest announcement from Facebook as a 'good first step'.
She observed: “The March 15 terrorist highlighted just how easily live-streaming can be misused for hate. Facebook has made a tangible first step to stop that act being repeated on their platform.
"There is a lot more work to do, but I am pleased Facebook has taken additional steps today alongside the Call and look forward to a long term collaboration to make social media safer by removing terrorist content from it."
Other leaders set to attend today's Paris summit include British Prime Minister Theresa May, Canadian Prime Minister Justin Trudeau and King Abdullah II of Jordan.
