Google's mail and application services are unavailable to some users.
Google's apps status dashboard shows that its Mail, Drive file storage service and office-application services are "disrupted.'' Its administrator control panel, which lets companies manage their Google applications, is completely down.
The disruptions started affecting people worldwide around 5 a.m. California time.
Google Inc. did not immediately respond to questions about the cause of the outage and how many people were affected.
It released a statement to CNBC that read: We are currently investigating issues with Gmail, Drive and Docs as well as the Google Apps Control Panel.
According to Google's apps status webpage, the outage is affecting less than .007 percent of Gmail users.
Those impacted by the outage received the following message:
"Google Drive encountered an error. If reloading the page doesn't help, please report the error. We're sorry, a server error occurred. Please wait a bit and try reloading your spreadsheet. To learn more about Google Drive, please visit our help center."
CNBC said users impacted by the outage can try logging on to iGoogle.com and logging in with their Gmail password. If your Gmail account isn't in one of the columns, try clicking the "Add Gadget" icon in the upper-right hand corner of the iGoogle webpage. Search for "Gmail" and click "add it now" to your iGoogle page. Then return to your iGoogle page and see if it appears.