Apple's services have been hit with widespread outages.
Users have reported that music, messages, maps and iCloud - amongst others - have appeared to have stopped working properly.
Apple’s internal systems are also said to be facing difficulties, causing problems at its retail stores and for staff who are working remotely, reports the Daily Star.
It's understood the tech giant's websites were also offline too, along with other internet services not working.
It is currently unclear what is causing all these issues.
Tracking website Down Detector showed an immediate increase in reports of problems with all of the Apple services it tracks: Maps, Music, iCloud, the Apple Store, the App Store, iMessage, the ‘Find My’ network, Apple’s support pages, iTunes, Apple News, Apple TV and Apple Fitness+.
This does not appear to have been a universal issue however, with some people still able to get onto at least some of Apple’s services as normal.
Social media users quickly turned to Twitter to check whether others were also suffering with the same issues.
One user wrote: "Just spent a good hour panicking resetting my phone because my messages wouldn’t send to come on Twitter and find out Apple is down."
A second tweeted: "Why did I not check Twitter before resetting my network settings a million times because of Apple maps being down."
A third said: "Ahhhhh apple is down, thought my phone was going crazy."
A fourth added: "Damn Apple Maps is down how am I going to find me way around these towns", while another added: "Bye omg we're in the middle of nowhere and apple maps is down."
Apple is yet to issue a statement about what has caused the outages.
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