San Francisco: Facebook on Friday said it is tightening live video streaming rules in response to the service being used to broadcast deadly attacks on mosques in New Zealand.

The Christchurch attacks -- carried out by a self-avowed white supremacist who opened fire on worshippers at two mosques -- claimed 50 lives.

Many people have "rightly questioned how online platforms such as Facebook were used to circulate horrific videos of the attack," chief operating officer Sheryl Sandberg said in an online post.

"In the wake of the terrorist attack, we are taking three steps: strengthening the rules for using Facebook Live, taking further steps to address hate on our platforms, and supporting the New Zealand community," she added.

Facebook is looking into barring people who have previously violated the social network's community standards from livestreaming on its platform, according to Sandberg.

The social network is also investing in improving software to quickly identify edited versions of violent video or images to prevent them from be shared or re-posted.

"While the original New Zealand attack video was shared Live, we know that this video spread mainly through people re-sharing it and re-editing it to make it harder for our systems to block it," Sandberg said.

"People with bad intentions will always try to get around our security measures." Facebook identified more than 900 different videos showing portions of the streamed violence.

The social network is using artificial intelligence tools to identify and remove hate groups in Australia and New Zealand, according to Sandberg.

Those groups will be banned from Facebook services, she said.

Facebook this week announce it would ban praise or support for white nationalism and white separatism as part of a stepped-up crackdown on hate speech.

The ban will be enforced starting next week on the leading online social network and its image-centric messaging service Instagram.

"It's clear that these concepts are deeply linked to organized hate groups and have no place on our services," the social network said in a statement.

Facebook policies already banned posts endorsing white supremacy as part of its prohibition against spewing hate at people based on characteristics such as race, ethnicity or religion.

The ban had not applied to some postings because it was reasoned they were expressions of broader concepts of nationalism or political independence, according to the social network.

Facebook said that conversations with academics and "members of civil society" in recent months led it to view white nationalism and separatism as linked to organized hate groups.

People who enter search terms associated with white supremacy will get results referring them to resources such as Life After Hate, which focus on helping people turn their backs on such groups, according to Facebook.

Amid pressure from governments around the world, Facebook has ramped up machine learning and artificial intelligence tools for finding and removing hateful content.

"We are deeply committed to strengthening our policies, improving our technology and working with experts to keep Facebook safe," Sandberg said.

"We must all stand united against hate and work together to fight it wherever and whenever it occurs."

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New Delhi, Apr 29: India on Monday summoned the Canadian deputy high commissioner and lodged a strong protest with him over raising of pro-'Khalistan' slogans at a public event in Toronto that was attended by Canada's Prime Minister Justin Trudeau and several other leaders.

The Ministry of External Affairs (MEA) described the shouting of the slogans at the event that was personally addressed by Trudeau as "disturbing" and said it illustrated once again the political space that has been given in Canada to "separatism, extremism and violence".

It said the actions not only impact India-Canada relations but also encourage a climate of violence and criminality in Canada to the detriment of its own citizens.

"The Canadian deputy high commissioner was today summoned to the Ministry of External Affairs with regard to the raising of separatist slogans on 'Khalistan' at an event which was being personally addressed by the prime minister of Canada," the MEA said.

The summoning of Deputy High Commissioner Stewart Wheeler came a day after the event in Toronto.

In his address at the event, Trudeau reaffirmed Canada's unwavering commitment to safeguard the rights and freedoms of the Sikh community.

"The Government of India's deep concern and strong protest was conveyed at such disturbing actions being allowed to continue unchecked at the event," the MEA said.

"This illustrates once again the political space that has been given in Canada to separatism, extremism and violence," it said in a statement.

It further added: "Their continued expressions not only impact India-Canada relations but also encourage a climate of violence and criminality in Canada to the detriment of its own citizens."

The ties between India and Canada came under severe strain following Trudeau's allegations in September of a "potential" involvement of Indian agents in the killing of Khalistani separatist Hardeep Singh Nijjar on June 18 in British Columbia.

New Delhi rejected Trudeau's charges as "absurd".

Days after Trudeau's allegations, India asked Ottawa to downsize its diplomatic presence in the country to ensure parity. Subsequently, Canada withdrew 41 diplomats and their family members from India.

India has been asserting that its "core issue" with Canada remained that of the space given to separatists, terrorists and anti-India elements in that country.

Following Trudeau's allegations last year, India temporarily suspended issuance of visas to Canadian citizens. The visa services were resumed several weeks later.