NEW: As illegal crossings at the southern border continue dropping to microscopic levels, @FoxNews has obtained two internal CBP intel memos highlighting two recent incidents in which two groups of migrants traveling to the US turned back due to increased security at US border. In one memo, a group of 23 migrants were encountered on a bus by Honduran law enforcement on February 5th. They were interviewed and:  "Upon learning about the multi agency force security on the Southwest Border in social media and thorough family members in the United States, the migrants decided to return to their country of origin.” In a second incident on February 3rd, a CBP memo describes a group of 26 migrants encountered by Honduran law enforcement at a checkpoint as they headed *south* into Nicaragua.  "The migrants had been United States-bound but due to increased security on the Southwest Border, they decided to return to their countries of origin.” Additionally… “The Migrants stated that they arrived at Tegucigalpa, and there, they decided to return to their countries of origin. During their return, and at the Guasaule POE (Honduran/Nicaraguan border), they attempted to make entry into Nicaragua, however, they were returned by Nicaraguan Immigration. The group then spoke with the Honduran Immigration (INM) and both institutions agreed on allowing them to return, if they were to continue enroute to their country of origin. All 26 migrants made entry into Nicaragua at approximately 7:00 a.m on February the 3rd." (All photos are from the CBP intel memos, showing the migrant groups being referenced).