Newsweek noted that the outage took place before US president Donald Trump's scheduled social media summit on Twitter.
The outage is occurring as President Donald Trump convenes a White House conference of like-minded critics of Big Tech.
He said the subject would be the "tremendous dishonest, bias, discrimination and suppression" that certain companies practice.
Facebook and its companies Instagram and Whatsapp experienced temporary interruptions in April, June and July this year. On July 3, 2019, Instagram, Whatsapp and Facebook users reported being unable to access the apps for some time.
Facebook acquired Instagram in 2012 and WhatsApp in 2014.
Outages were widespread in Twitter's early years, so much so that a cartoon "fail whale" the company would put up during outages came to symbolize Twitter almost as much as its little blue bird icon. The whale was retired in 2013, largely because Twitter didn't want to be associated with what it represented any more. After all, outages had become far less common.
This time, Twitter's home page reads in part, "Something is technically wrong. Thanks for noticing."
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