Facebook is currently down for many users.

Users began reporting that Facebook has been inaccessible since at least 8:15 a.m. ET.

Facebook has confirmed the outage on its developer site. “We are investigating the issue and working on a resolution,” a Facebook spokesperson wrote in a message on the site.

#FacebookDown is currently the top trending topic on Twitter as users flock to the site to report on the Facebook outage.

Users are also reporting that Instagram is also down. #InstagramDown is also trending on Twitter.

Most users who are experiencing the Facebook outage report seeing an error message stating “Sorry, something went wrong. We’re working on it and we’ll get it fixed as soon as we can.”

Facebook also had issues last week, displaying broken error messages stating “Sorry, something went wrong. We’re working on it and we’ll get it fixed as soon as we can.” The outage lasted roughly half an hour on the afternoon of Monday, Nov. 12.

Facebook later said last week’s outage was due to a “routine test.”

“Earlier today, a routine test caused users to have trouble accessing or posting to all Facebook services including WhatsApp and Instagram. We quickly investigated and restored access for everyone. We’re sorry for the inconvenience,” a spokesperson told USA Today last week.

Variety wrote: In 2004, when Mark Zuckerberg was a Harvard undergrad working on a skunkworks project called The Facebook, a friend asked him how he’d managed to obtain more than 4,000 emails, photos and other bits of personal info from fellow students.

“People just submitted it. I don’t know why. They ‘trust me,’” Zuckerberg wrote in an instant-messaging exchange leaked to website Silicon Alley Insider. The guy who would become CEO of one of the world’s biggest tech giants added, “Dumb f—s.”

Zuckerberg later expressed regret for those disdainful remarks in a 2010 New Yorker interview, saying he had “grown and learned a lot.”

Few months ago, the Facebook co-founder, now 33, was facing his toughest grown-up test yet — steering his global enterprise through a data-privacy crisis that has angered users, led panicked investors to sell the stock and drawn intense scrutiny from lawmakers and regulators worldwide.