The online services provided by Apple can be tracked through the company's System Status page, which provides real-time updates on its stores, iCloud, and other features such as iMessage. As of Friday morning, iMessage and FaceTime were experiencing issues for over an hour.
The downtime for some users marks the second time this week that Apple's services have seen issues. Downtime reached more than five hours when both FaceTime and iMessage became unavailable on Tuesday.
As with the outage earlier this week, other services appear to be unaffected, as features like Photo Stream and digital stores like the App Store remain available.
Apple has seen a number of sporadic iCloud service outages in recent weeks. The issues are typically resolved within one to two hours.
Update: Apple fixed the issue as of 6:07 p.m. Pacific. The outage lasted for a little over one hour.