Thousands of “special interest aliens” from numerous countries, including the Middle East, have been arrested by Border Patrol agents while attempting to cross the U.S. southern border illegally over the last two years, according to internal Customs and Border Protection (CBP) data leaked to Fox News.

“Special interest aliens” are people from countries identified by the U.S. government as having conditions that promote or protect terrorism or potentially pose some sort of national security threat to the U.S.

That data, confirmed by multiple CBP sources and reflects apprehensions between ports of entry between October 2021 and October 2023, shows that agents encountered 6,386 nationals from Afghanistan in that period as well as 3,153 from Egypt, 659 from Iran and 538 from Syria.