Hundreds of immigrants on the federal terror watch list have been caught at the southern and northern U.S. borders in recent years, and national security experts say there is a real threat of a terrorist attack on American soil as a result.
With the conflict between Israel and the Gaza-based terrorist group Hamas escalating, that threat has only grown.
U.S. Customs and Border Protection's San Diego field office warns that Hamas may attempt to send individuals to the U.S. through the southern border.
"San Diego Field Office Intelligence Unit (SDFO-FITU) assesses that individuals inspired by, or reacting to, the current Israel-Hamas conflict may attempt travel to or from the area of hostilities in the Middle East via circuitous transit across the Southwest border," an unclassified document from the office reads.
