Sen. Martin Heinrich Martin Trevor HeinrichOvernight Defense: Dems aim to block use of defense funds for wall | Watchdog issues new warning on Syria withdrawal | Trump wants to 'watch Iran' from Iraq Senate Dems introduce bill to block Trump from using military funds to build wall Puerto Rico statehood supporters pin hopes on House action 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

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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.