At least 49 people have been killed and 48 injured in shootings at Masjid Al Noor and the Linwood Masjid mosques in Christchurch.
But a few hours later, footage from the stream remained on Facebook, Twitter and Alphabet Inc's YouTube, as well as Facebook-owned Instagram and WhatsApp.
"New Zealand Police alerted us to a video on Facebook shortly after the livestream commenced and we removed both the shooter's Facebook account and the video", said Mia Garlick, a Facebook representative in New Zealand.
Facebook, YouTube and other social-media platforms are struggling to scrub offensive content from sites that generate billions of dollars in revenue from advertisers.
Facebook and YouTube did not immediately respond to HuffPost's request for comment on the matter.
Copies of the footage reviewed by Reuters showed that some users had recorded the video playing on their own phones or computers to create a new version with a digital fingerprint different from the original.
"There is no fool-proof way to catch acts of violence on video or images with the technology that we have today", she said.
PewDiePie, whose real name is Felix Kjellberg, said on Twitter he felt "absolutely sickened" that the alleged gunman referred to him during the livestream. "Platforms can't prevent that, but much more can be done by platforms to prevent such content from gaining a foothold and spreading".
Motherboard has found out that once a live video has been flagged on Facebook, moderators will have the ability to " ignore it, delete it, check back in on it again in five minutes".
Près de 3000 lycéens marchent pour le climat à Tours
"123 pays!", a tweeté la jeune Suédoise Greta Thunberg , icône du mouvement avec sa grève hebdomadaire de l'école. Les étudiants du monde entier s'étaient donné rendez-vous ce vendredi pour faire la grève en faveur du climat.
Attacks against Congo's Ebola treatment centers threaten gains
The bodies of victims are highly contagious, and the aid group said that figure shows community mistrust is still widespread. He said the WHO would not leave when the outbreak ended, but would help the government to build stronger health services.
In the United States, the assault in Chicago of an 18-year-old man with special needs, accompanied by anti-white racial taunts, in 2017, and the fatal shooting of a man in Cleveland, Ohio, that same year, were also live-streamed. After more than a day, and 370,000 views, Facebook removed the video. "Can we ever make live videos safe?"
"The responsibility for content of the stream lies completely and exclusively on the person who initiated the stream".
The rampage's broadcast "highlights the urgent need for media platforms such as Facebook and Twitter to use more artificial intelligence as well as security teams to spot these events before it's too late", Ives said.
"Our hearts are broken over today's awful tragedy in New Zealand", read the statement.
Ionescu said that's because video and images are harder to block than words.
Satellite navigational audio could also be heard in the video as he drove to the mosque.
Members of a group called "watchpeopledie" on internet discussion board Reddit, for example, discussed how to share the footage even as the website took steps to limit its spread.
First and foremost, the prime minister of the country, Jacinda Ardern, made an emotional statement after the shootings, calling Friday "one of New Zealand's darkest days".
"There's no excuse for the content from that livestream to be still circulating on social media now", said Lucinda Creighton, a former government minister in Ireland and an advisor to the Counter Extremism Project, which campaigns to remove violent internet content.
Court documents allege Sidoo paid William Singer to arrange for Florida man Mark Riddell to fly to Vancouver and take the tests. A total of about 50 people, including celebrities Lori Loughlin and Felicity Huffman , have been charged in the scandal.
The Monroe County Sheriff's Office was notified of the arrest and has initiated extradition proceedings. After a bond hearing in front of a court commissioner, he is now awaiting extradition to Florida.
His arrival in New Orleans was a part of the headline-making trade with the Seattle Seahawks for tight end Jimmy Graham in 2015. Not only are the Saints losing a three-time Pro Bowler, Unger was one of the leaders within the New Orleans organization.
Two federal judges have ruled that Ross' planned addition of the question violated administrative law and was unconstitutional. Ross claimed that DOJ wanted to add the question in order to better enforce aspects of the Voting Rights Act.
Massey is being sued by a 13-year-old girl who says the former child TV star sent her sexually explicit photos and a video. Days later, Massey allegedly began sending "numerous sexually explicit text messages, images, and videos" to the girl.
No making out". "Jordyn is still clinging to the hope that Khloe will forgive her, she just can't imagine being shut out forever". "She wanted the ideal family set up for their daughter True , but Tristan was not ready to be all that Khloe wanted".
Wales shrugged off the rain, wind and Ireland to win the Six Nations and complete the Grand Slam this morning (local time). Wales were as low as eighth in the rankings less than two years ago after finishing fifth in the Six Nations.
Rahm, who's just 24, will be trying to validate a year of maturing, reeling in his sometime tempestuous demeanor inside the ropes. I've been so balanced - nothing like I used to be, nothing like before. "I've been really proud the way I've handled.
April the giraffe gives birth
Fans of April the Giraffe can rejoice because the well-known animal welcomed a baby boy on Saturday, park officials said. In addition to Tajiri and her youngest offspring, April is also mom to three others, which were born behind the lens.
Grieving families given earth from Ethiopian crash site
The announcement comes in the wake of last week's Ethiopian Airlines crash that killed all 157 passengers and crew onboard. Family members are being give a 1 kilogram sack of scorched earth taken from the crash sites, said two family members.
Mt Gox head convicted of manipulating data, cleared of theft
Karpelès, wearing a dark suit, bowed to the judge as he entered the courtroom." He was motionless after the verdict was read out. The odds were stacked against Karpeles as the vast majority of cases that come to trial in Japan end in a conviction.
New Zealand Massacre suspect was gun club member
NZ Prime Minister Jacinda Ardern says despite the attacks being carried out in Christchurch, he had been based in Dunedin. Handcuffed, shoeless Tarrant appeared in a Christchurch District Court on Saturday and was charged with murder .
US hoops draws Turkey, Czech Republic, Japan in World Cup
There will be 12 teams in the Olympic field - host Japan is one, and seven other nations will directly qualify from the World Cup. The official draw for the World Cup had the Philippines clustered with Italy, Serbia, and Angola in Group D .