Facebook is down for many users, who are reporting trouble logging in or a “total blackout.”

When attempting to login, users may see an error notification that says:

“Facebook Will Be Back Soon

“Facebook is down for required maintenance right now, but you should be able to get back on within a few minutes. In the meantime, read more about why you’re seeing this message. Thanks for your patience as we improve the site.”

DownDetector.com reports a spike in reported problems at 8 a.m. Saturday with regard to Facebook. There were 5,723 reports after 8 a.m. Forty percent reported trouble logging in, and the about the same reported a “total blackout.”

There’s more than 2 billion monthly active Facebook users, according to Zephoria, or about one out of every four people in the world.