NEW: This is the largest group of migrants we’ve ever seen being held by Border Patrol under Anzalduas Bridge in Mission, TX. Looks like it could be up to 1,000 people. We can only get a look at the area with our drone. There’s a popular Rio Grande crossing area nearby. @FoxNews pic.twitter.com/AsAygsO966

— Bill Melugin (@BillFOXLA) August 1, 2021