A Tuesday iCloud outage is preventing some people from accessing services like calendars or mail, or even logging into iCloud in the first place, according to numerous complaints on Twitter and received by AppleInsider.
The problem is spread worldwide, affecting people in the U.S., Canada, and Europe, and possibly other regions. Issues are believed to have begun shortly before 11:30 a.m. Eastern time.
Some users are already reporting services being restored, but in other cases, complaints are persisting.
Trouble with iTunes began around the same time. Apple's official System Status tracker is indicating problems with numerous other online services, such as Find My iPhone, Game Center, Photos, and Back to My Mac.
iCloud has witnessed a number of major outages since the network launched in 2011. The last one hit on May 20, and lasted into the following day, taking down many of the same services that went offline on Tuesday.
Update: The System Status page indicates that all services are back online as of noon Eastern.