Another large group of illegal aliens surrendered themselves to U.S. Border Patrol agents near Yuma , Arizona.

A total of 654 mostly Guatemalan nationals in family units or unaccompanied juveniles , illegally entered the United States on both sides of the San Luis Port of Entry on Monday and Tuesday of this week. Larger numbers have started to cross illegally by wading through shallow portions of the Colorado River near Yuma. The Border Patrol says the groups are not believed to be associated with the large caravan being monitored travelling through Mexico.