Afghanistan, Dec. 12 -- A senior U.S. official told Congress that about 2,000 Afghan evacuees were allegedly flagged for possible extremist links, though no confirmed ties were established.

A senior U.S. counterterrorism official has informed Congress that thousands of individuals flagged for potential extremist links have entered the United States in recent years, including a limited number among Afghans evacuated after the fall of Kabul. Joe Kent, director of the U.S. Government's Counterterrorism Center, briefed the House Homeland Security Committee and raised concerns about gaps in screening during the 2021 evacuation.

Kent said the center's assessment estimates that around 18,000 suspected individuals arrived in the country during th...