A short time later, Facebook indicated the outage was not related to an attack aimed at overwhelming the network.
"We're focused on working to resolve the issue as soon as possible, but can confirm that the issue is not related to a DDoS attack," Facebook said, referring to what is known as a distributed denial of service cyber strike.
According to the website downdetector.com, outages were heaviest in North America and Europe, but some users appeared to be affected in other regions.
Last November, a Facebook outage was attributed to a server problem and a September 2018 outage was said to be the result of "networking issues.
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