A White House staffer left the password to his encrypted email account at a bus stop in Washington, D.C., according to a new report.

Ryan McAvoy left his ProtonMail passwords and email address on a piece of White House stationery at a bus stop near the White House, The Intercept reported Saturday. 

Someone reportedly found the piece of paper and turned it over to The Intercept, which said that it confirmed its authenticity. The aide, who works as a staff assistant in the White House, did not return The Intercept's requests for comment.

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House Intelligence Committee Democrats said Wednesday they are interested in filing a subpoena to see how Trump campaign officials used WhatsApp, a messaging service. 

Democrats said they want to see how how senior White House adviser Jared KushnerJared Corey KushnerThe Hill's Morning Report - Presented by the American Academy of HIV Medicine - Will there be any last-minute shutdown drama? Rule change sharpens Dem investigations into Trump Drama hits Senate Intel panel’s Russia inquiry MORE and other campaign employees are using the messaging app and others such as iMessage, Facebook Messenger, Signal, Slack, Instagram and Snapchat on the encrypted networks. 

The committee may consider adding ProtonMail to that list, The Intercept reported. 

Last September, it was reported that six members of Trump’s administration used private email addresses while conducting government business.  

President TrumpDonald John TrumpGillibrand backs federal classification of third gender: report Former Carter pollster, Bannon ally Patrick Caddell dies at 68 Heather Nauert withdraws her name from consideration for UN Ambassador job MORE and Republicans had attacked former Democratic candidate Hillary ClintonHillary Diane Rodham ClintonSanders expected to announce exploratory committee next week Bernie Sanders records announcement video ahead of possible 2020 bid Overnight Defense: Trump declares border emergency | .6B in military construction funds to be used for wall | Trump believes Obama would have started war with North Korea | Pentagon delivers aid for Venezuelan migrants MORE over her use of a private email server while serving as secretary of State, calling it reckless.

Democrats on the Intelligence panel released a memo on Wednesday to lay out their responsibilities in the Trump-Russia investigation, which Republican members have said is wrapping up. Democrats, meanwhile, have pledged to continue their investigation.