CHICAGO (CBS) — Facebook, along with its Instagram and What’s App platforms, crashed Monday morning.

Users were unable to access those sites, starting around 11:45 a.m., Eastern Time.

READ MORE: Gen. Colin Powell, Former Secretary Of State, Dies At 84 Due To Complications From COVID-19

Facebook et. al.  went to Twitter to confirm the outage.

As of 1 p.m., the sites were still down.

READ MORE: Gen. Colin Powell Remembered Fondly At His Alma Mater, CCNY, And In The Bronx, Where He Was Raised

The reason for the outage, which has been reported worldwide, was not immediately known.

On Sunday, in her first interview, former Facebook employee and whistleblower Frances Haugen told 60 Minutes correspondent Scott Pelley about what she called “systemic” problems with the platform’s ranking algorithm that led to the amplification of “angry content” and divisiveness. Evidence of that, she said, is in the company’s own internal research. Security experts with Facebook told the New York Times that a hack was unlikely because the differences in technology behind the company’s various apps.

Other security experts are looking at a problem with the company’s Domain Name System (DNS) records, which apparently have disappeared. The DNS is essentially the internet’s phone book, directing users to specific sites and platforms.

MORE NEWS: Report: Feds May Allow Americans To Get Different COVID Booster Than Vaccine They First Received

“Facebook’s mission is to connect people all around the world,” said Haugen. “When you have a system that you know can be hacked with anger, it’s easier to provoke people into anger. And publishers are saying, ‘Oh, if I do more angry, polarizing, divisive content, I get more money.’ Facebook has set up a system of incentives that is pulling people apart.”