Editor's note: Yuma, just west of this latest incident, had to declare a state of emergency due to the number of migrants crossing the border.

TUCSON, Ariz. (AP) — U.S. Border Patrol officials say 231 migrants — mostly families from Central America — have surrendered to agents in Arizona west of the Port of Lukeville. 

Border Patrol camera operators spotted several groups in a remote area near Quitobaquito Springs about 2 a.m. Tuesday.

A Department of Homeland Security health team was deployed to assist with medical evaluations for the mostly family units and unaccompanied juveniles from Guatemala, Honduras, and El Salvador.

VIDEO: Armed men spotted escorting mom, son into U.S., border patrol says

Border Patrol officials say the crossing point the group used was the same location where 399 people surrendered to agents last week.

They also say the vast majority of family units crossing the southwest border are surrendering immediately to Border Patrol agents.

The port is about 40 miles south of Ajo, Arizona, on AZ-85.