A Domain Name System error that originated from Amazon's largest and oldest data center took down major sites Monday. The outage has been resolved.

A status page for Amazon's cloud unit showed more than 80 of its services and features were affected early Monday.

"We have narrowed down the source of the network connectivity issues that impacted AWS Services," read the latest update from the AWS status page. "The root cause is an underlying internal subsystem responsible for monitoring the health of our network load balancers."

Amazon's cloud services unit AWS was struggling to recover on Monday from a widespread outage that knocked out thousands of websites along with some of the world's most popular apps - Snapchat and Reddit - and disrupted businesses globally.

Scores of the websites and apps, including Facebook, Disney+ and Reddit were hit by a global outage overnight caused by an "operational issue" at U.S. cloud services provider Amazon Web Services. At the peak of the incident,

An Amazon Web Services outage continued into Monday afternoon, impacting Amazon's own services and as well as apps around the world.

The massive Amazon Web Services (AWS) outage that has disrupted online activity around the world is also impacting Amtrak customers’ ability to make reservations. “Amtrak is currently experiencing intermittent technical difficulties that are impacting several key services,