WATCH: Captured ISIS Fighter Describes Plot to Send Terrorists Across US-Mexico Border

In a recent video, a captured ISIS fighter details the terrorist group’s plans to infiltrate America via the porous US-Mexico border – further proof that the crisis at the southern border is far more severe than many realize.

The detained fighter claims that an unidentified ISIS operator inside the US arranged for other terrorists to be smuggled into the country through Puerto Rico and Mexico.

Earlier in the week, CBP revealed that agents detained over 100,000 illegal aliens at the US-Mexico border during may, and also released footage of a large group of Africans attempting to enter the US at the Mexican border.