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On DownDetector, a website that tracks online outages, users reported issues with Snapchat, Roblox, Fortnite, online broker Robinhood, the McDonald’s app and many other services. Coinbase and Signal both said on X that they were experiencing issues related to the AWS outage.

The first signs of trouble emerged at around 3:11 a.m. Eastern Time, when Amazon Web Services reported on its Health Dashboard that it is “investigating increased error rates and latencies for multiple AWS services in the US-EAST-1 Region.�

Later the company reported that there were “significant error rates� and that engineers were “actively working� on the problem.

Around 6 a.m. Eastern Time, the company said that it was seeing recovery across most of the affected services. “We can confirm global services and features that rely on US-EAST-1 have also recovered,� it said, adding that it is working on a “full resolution.�

AWS customers include some of the world’s biggest businesses and organizations.

“So much of the world now relies on these three or four big (cloud) compute companies who provide the underlying infrastructure that when there’s an issue like this, it can be really impactful across a broad range, a broad spectrum� of online services, said Patrick Burgess, a cybersecurity expert at U.K.-based BCS, The Chartered Institute for IT.

"The world now runs on the cloud" and the internet is seen as a utility like water or electricity as we spend so much of our lives on our smartphones, Burgess said.

And because so much of the online world's plumbing is underpinned by a handful of companies, when something goes wrong "it's very difficult for users to pinpoint what is happening because we don't see Amazon, we just see Snapchat or Roblox," Burgess said.

"The good news is that this kind of issue is usually relatively fast (to resolve)" and there's no indication that it was caused by a cyber incident like a cyberattack, Burgess said.

"This look's like a good old fashioned technology issue, something's gone wrong and it will be fixed by Amazon," he said.

There are "well-established processes" to deal with outages at Amazon Web Services, as well as rivals Google and Microsoft, which together provide most of the world's cloud computing infrastructure, Burgess said, adding that such outages are usually fixed in "hours rather than days."

Amazon Web Services said at about 6:30 a.m. Eastern time that "most AWS Service operations are succeeding normally now."

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AP writer Mustakim Hasnath in London contributed to this report.