The advisory called on soldiers to "be aware and report any unusual incidences." 

The warning was issued to all officers and soldiers of the IDF. 

Attached to the warning was an article from Israeli daily Yediot Aharonot chronicling a phenomenon circa 2012 in which post-army youngsters, upon arrival in the United States, were taken in for extensive questioning by American authorities in an attempt to recruit their services.

"Every security body fears having its confidential information leaked," an Israeli security source told Channel 2. 

It remains unclear why the IDF chose to issue the warning now.