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".
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.
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.
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.
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.
The New York Times , which first reported the sentencing, said White had been given two court hearings, on March 6 and March 9. A fourth, former Federal Bureau of Investigation agent Robert Levinson, has been missing in Iran since 2007.
At least two Jordanian citizens were killed and five others wounded in the shootings, the country's Foreign Ministry said. New Zealand mosque attacks: Brenton Harrison Tarrant live-streamed for about 17 minutes his rampage through two mosques.
La date de son arrivée dans le Béarn dépendra de sa participation ou non à la Coupe du monde au Japon (20 septembre - 2 novembre). Luke Whitelock constitue la 5e recrue de la Section après Denis Marchois, Alexandre Dumoulin, Ben Smith et Sigfried Fisi'ihoi.
"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.
The 2012 Heisman Trophy victor at Texas A&M had his contract with the CFL terminated this offseason. He went on to sign with the Hamilton Tiger Cats of the Canadian Football League in 2017.
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.
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 .
Kyle Massey Sued Over Alleged Sexual Misconduct With A Minor
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.
Australia target World Cup win after stunning India
Khawaja, who was named man of the series, said it was a sweet vengeance after the home ODIs annihilation to India early this year. Talking about his own terrific form in this series, Khawaja said it was very satisfying to play a part in the team's victory.