Hillary Clinton hired a Connecticut company to back up her emails, and due to a technical glitch some may still reside on one of the firm’s “cloud” storage sites, a Republican Senate committee chairman revealed.

The disclosures, in a letter Monday from Wisconsin Sen. Ron Johnson, heighten the possibility that some of Clinton’s more than 31,000 personal emails may still be recovered. She said last March that she deleted them all upon turning over her work-related emails to the State Department in December 2014 in response to a request.

Congressional committees have voiced skepticism as to whether the 30,940 emails that the Democratic presidential candidate handed over represented all of her business emails. The FBI is separately investigating whether Clinton’s arrangement put classified information at risk.

His letter to the chief executive of Datto Inc. of Norwalk, Conn., offers the first public confirmation that Clinton or her aides arranged for a backup of her email server after leaving office in early 2013.

Read the article “Glitch: Hillary Server Data May Still Be in the ‘Cloud’; IT Firm Agrees to Give Data to FBI” on thestate.com.