Millions of new users joined the Edward Snowden-endorsed Signal on Monday, it said on Twitter
"This disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt," the company's engineering team wrote in a blog post Monday night
The company in a late Monday blog post did not specify who executed the configuration change and whether it was planned.
All of Facebook's services, including WhatsApp and Instagram, were down for users globally beginning Monday night.
Facebook's engineering team apologised as the apps started to come back online
"WhatsApp", and "#facebookdown", "#whatsappdown" and "#instagramdown" were trending on Twitter on Monday evening in India
Frances Haugen identified as the woman who anonymously filed complaints with US law enforcement that Facebook's own research shows how it magnifies hate and misinformation.
The whistle-blower, who already shared a trove of internal documents with the Wall Street Journal, will appear in an interview on "60 Minutes" Sunday evening
Facebook will now let users start cross-app group chats between Messenger and Instagram, the company has announced.
"Facebook has shown us once again that it's incapable of holding itself accountable," said Blumenthal, the chair of the Senate Commerce Committee's consumer protection panel.
The programme includes an e-learning course, aimed at encouraging, educating and enabling creators even more on the platform
Facebook has been under fire for the past week after a report said internal documents showed that the social media company was aware that Instagram harmed the mental health of young users
Social media giant Facebook in comparison in the second quarter had 3.51 billion monthly users across its family of apps, up from 3.45 billion in the first quarter
Instagram has hit pause on a new app it is creating for kids, the photo-sharing service owned by Facebook Inc said on Monday, in a move that comes amid growing opposition for the project
The announcement follows a withering series by the Wall Street Journal, which reported that Facebook was aware that the use of Instagram by some teenage girls led to mental health issues and anxiety
Facebook's policy of pursuing profits regardless of documented harm has sparked comparisons to Big Tobacco, which knew in the 1950s that its products were carcinogenic but publicly denied it
In a bid to make the platform safer for its younger audience, the Facebook-owned Instagram is asking users to supply their date of birth
Dozens of desperate Afghans who had been trying to flee the Taliban before Tuesday's deadline for the US withdrawal from Kabul made it to safety with help from an unexpected place
Facebook-owned Instagram is ditching the "swipe-up" link in Instagram Stories starting on August 30