Sen. Martin Heinrich Martin Trevor HeinrichSenate Democrats demand White House fire controversial head of public lands agency Senate Democrats seek removal of controversial public lands head after nomination withdrawal Five takeaways from final Senate Intel Russia report MORE (D-N.M.) called out President Trump on Twitter Friday after a photo showing what Heinrich said was a key to classified information was left out in the open on the president's desk.

"Never leave a key in a classified lockbag in the presence of non-cleared people. #Classified101," Heinrich tweeted along with a photo from the Associated Press, which includes a close-up shot of a golden key sticking out of a lockbag on the president's desk.

Never leave a key in a classified lockbag in the presence of non-cleared people. #Classified101 (Original Photo @AP https://t.co/F4KaPbX9Hw) pic.twitter.com/4GmKK8dp5K — Martin Heinrich (@MartinHeinrich) February 10, 2017

ADVERTISEMENT

The photo was taken Wednesday during a meeting between Trump and Intel CEO Brian Krzanich in the Oval Office intended to tout the company's plan to invest more than $7 billion in an Arizona-based factory.

It's unlikely that many of the people in the room, including members of the press and Krzanich, have the security clearance to access classified documents.

No reports have emerged that anyone used the key inappropriately.