Users are reporting downtime for some of Apple’s iCloud services this afternoon including problems logging in to iCloud and syncing data to apps that access the cloud services for calendars, mail and more.

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9to5Mac readers and a growing number of users on Twitter are reporting issues with iCloud email as well as Apple’s iMessage service and more. Some users are unable to log in to Apple’s iCloud website with a “Connection Error” message warning users that “iCloud encountered an error while trying to connect to the server.”

Apple is yet to report the outage for iCloud on its system status page that tracks downtime for the many Apple services that use iCloud. Some app developers have noticed the issue, however, and have started to warn users. Developer of calendar app Fantastical, for example, warned its users of the problem on Twitter:

“iCloud appears to be down currently. Don’t be surprised if you see status code 400 errors until it comes back.”

We’ll update when/if Apple updates its system status page with more info on the outage. Let us know below if you’re experiencing problems with iCloud today.