Biden under pressure as U.S.-Mexico border arrests reach record highs

FILE PHOTO: Migrants seeking refuge in United States cross the Rio Grande river, with bags and children in tow, back into Ciudad Acuna, Mexico from their camp in Del Rio, Texas, U.S. September 21, 2021. Picture taken with a drone. REUTERS/Adrees Latif//File Photo

(Reuters) - U.S. authorities arrested 1.7 million migrants at the U.S.-Mexico border this fiscal year, the most ever recorded, according to a U.S. government source familiar with the numbers, underscoring the stark political and humanitarian challenges the Biden administration faces on immigration.

The current numbers for the 2021 fiscal year, which began last October, topped a previous high in 2000. The numbers were first reported by the Washington Post.