In an update to Apple's online systems status webpage, the company announced ongoing outages of all iCloud services, including account sign-ins, mail, storage and more.
According to the status page, "some" iCloud users on Monday are unable to access from all of the service's features, an issue that has lasted well over an hour at the time of this writing.
While the extent of iCloud's downtime is unknown, AppleInsider readers from the U.S., Australia and other countries are seeing the issue. Interestingly, only certain customers are being affected by the outage despite living in the same area and having similar hardware.
Apple has yet to reveal what exactly caused the breakdown, but informed guesses suggest the company is experiencing server issues at iCloud's central facility in Maiden, N.C. Alternatively, the company's content delivery network, launched in July, may be to blame.
This story will be updated as more information comes in.
Update: Apple is now reporting additional service outages for Documents in the Cloud and Photos.
Update 2: Apple's iCloud services returned to service shortly after 5 p.m. Pacific.