According to Apple’s System Status page, several App Store and iTunes services are experiencing issues preventing some users from access, purchasing or updating.
The issue began this morning at around 9 a.m. Central Time and appears to affect many users all over the world. Apple TV services, iBooks, Cloud services, and Volume Purchase Program are also affected by the issues.
You can find out more information on which services are affected at Apple’s System Status page. Of course, the Rocket Yard will keep an eye on the situation as it continues.
Update: As of 11:10 a.m. Central Time, the issue appears to be resolved.