Salesforce.com experienced system problems in a number of regions yesterday.

The problem began in Salesforce.com's NA2 instance in North America, according to an online notice. A subsequent note blamed a "fault" in Salesforce.com's storage tier for the issue and said it was preventing customers from accessing the service.

"The Team is working with our storage vendor to resolve the issue as soon as possible," Salesforce.com said a few hours later. "Please check the status of trust.salesforce.com frequently for updates regarding this issue. We thank you for your continued business and patience during this situation."

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In another update, Salesforce.com reported that teams were "working to isolate a performance degradation issue on the NA3 & EU0 instances," with the latter meaning that European users were also affected.

The NA3 problems have been resolved, according to a notice posted yesterday afternoon. The EU0 zone is also now working normally, Salesforce.com said shortly after.

By the evening the company updated its status to say that all of the outage issues had been resolved and said via Twitter that it would provide more information on the cause.