Border Patrol agents arrested an Afghan national on the FBI’s terror watchlist after he crossed into the U.S. illegally Wednesday in California, multiple sources at the U.S. Customs and Border Protection (CBP) told Fox News.

The Afghan national crossed the border with a group of migrants near Otay Mesa, California, the sources said. Border Patrol agents took the migrants to a processing station, where a fingerprint scan determined the Afghan was a match on the Terrorist Screening Database. The FBI was then notified, confirmed the results, and began an investigation.

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Border Patrol agents arrested an Afghan national on the FBI’s terror watch list after he crossed into the U.S. illegally Wednesday in California, multiple sources at the U.S. Customs and Border Protection (CBP) told Fox News. ((Photo by Qian Weizhong/VCG via Getty Images))

The arrested subject crossed the border a day prior to the end of Title 42 — a COVID-19 emergency policy that allowed border agents to turn away migrants. Thousands of migrants have flooded to the border since the policy expired.

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Migrants cross a barbed-wire barrier into the United States

Migrants cross a barbed-wire barrier into the United States from Ciudad Juarez, Mexico, Tuesday, May 9, 2023.  ((AP Photo/Christian Chavez))

Rep. Darrell Issa, R-Calif., who represents the district where the arrest was made, told Fox News the Biden administration’s border policies attract terrorists.

"Biden’s open borders aren’t just a gateway to five million illegals, record human and child trafficking and the deadliest drug crisis in our history," Issa said. "Biden’s reckless policy is also an open invitation to even the most wanted terrorists in the world to come to America. They know they’ll never have to leave. The nation knows what’s going on and this president has only begun to be held accountable for what he has done."

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MATAMOROS, MEXICO - Migrants walk into the Rio Grande from the bank of the river as they cross to enter the United States on May 11, 2023 in Matamoros, Mexico. (Joe Raedle/Getty Images)

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Issa’s office said they confirmed the arrest of the suspected terrorist with their local CBP.