Microsoft confirmed on Tuesday that it is investigating issues with its Windows Phone Marketplace.

Windows Phone owners began reporting problems accessing the Marketplace on Tuesday morning, with many receiving an error code. Access to the Marketplace was mixed according to WPCentral who first reported the issues on Tuesday. Windows Phone 7 and 7.5 users were both unable to access the Marketplace to download new applications or update existing ones.

Microsoft acknowledged the problems in an email to WinRumors. “We have received reports that some customers are having intermittent problems downloading applications from the Windows Phone Marketplace,” admitted a Microsoft spokesperson. “We are investigating these reports and addressing the issue as quickly as possible.” Microsoft also apologised for any inconvenience and promised to provide an update when the company has more to share.

The issues mirrors a similar incident that occurred in early May this year. Windows Phone “NoDo” users were unable to access the Marketplace for around seven hours. The outage was the result of planned maintenance that took longer than expected. At the time, Microsoft promised that the root cause of the issue had been identified and that the company was taking steps to prevent future disruptions in the Marketplace service.