US border patrol agents have seen a 50% drop in the number of migrants crossing the border since the pandemic-era immigration policy known as Title 42 expired at midnight on Thursday, Homeland Security Secretary Alejandro Mayorkas said on Sunday.

Hundreds of migrants prepared to camp in the cold at Mexico's northern border over Christmas, hoping for a swift reversal in U.S. migration restrictions as they endure the bite of a winter storm ravaging the United States.