The Treasury Department told staff not to share photos of the White House’s East Wing as parts of it are torn down to build President Donald Trump’s ballroom, a spokesperson confirmed to NBC News on Tuesday.

Workers broke ground Monday on the planned 90,000 square foot, $250 million ballroom, which will replace parts of the East Wing.

Trump in July had said that construction of the ballroom “won’t interfere with the current building.”

Treasury’s warning to its employees comes after photos of excavators tearing down parts of the building went viral online.

The Treasury Department is located next door to the East Wing, with a clear view of the demolition work.