[UPDATE-Apr. 13] U.S. Authorities Check Validity of Classified Documents Posted on Social Networks, Says Pentagon

The U.S. Department of Defense (DoD) will assess the validity of classified documents posted last week on social networks, Pentagon deputy press secretary Sabrina Singh said in a statement on Monday.

“An interagency effort has been stood up, focused on assessing the impact these photographed documents could have on U.S. national security and on our Allies and partners,” she said. “Over the weekend, U.S. officials have engaged with Allies and partners and have informed relevant congressional committees of jurisdiction about the disclosure,” Singh added.

[UPDATE-Apr. 13] The FBI has arrested “suspected Pentagon leaker” U.S. Air National Guard pilot Jack Teixeira.