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 KushnerRepublicans request documents on Kerry's security clearance process Iran moves closer to a diplomatic breakthrough that may upset Israel Trump alumni launch America First Policy Institute 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 TrumpTrump's Facebook ban to stay in place, board rules Trump allies launching nonprofit focused on voter fraud DOJ asks for outside lawyer to review Giuliani evidence MORE and Republicans had attacked former Democratic candidate Hillary ClintonHillary Diane Rodham ClintonPelosi's archbishop calls for Communion to be withheld from public figures supporting abortion rights Hillary Clinton: Biden less 'constrained' than Clinton and Obama due to prior administration Biden's unavoidable foreign policy crisis 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.