The largest single group of asylum-seekers who ever passed under the border wall to the US near San Luis, Arizona, voluntarily turned into customs and border guards on Monday.
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Migrants can be seen marching towards Border Patrol Agents the hundreds, according to video by ABC News. Smugglers dug a series of seven holes just a few feet below the steel fence. Hundreds went under the wall and a smaller number climbed over it, according to CBP.
The fresh sand and scuff marks on rusty steel shoes were still there when ABC News visited the site on Thursday.
The agency says 179 of the record figure that 376 people who were crossed were children, including over 30 unaccompanied minors – children under 18 traveling alone.
The total number of unauthorized intersections has fallen since its peak in 2001, when CBP reported about 1.6 million arrests, according to government statistics. However, the demographics of these crosses has changed dramatically.
Parents with children now account for over 80 percent of the total concern of those who cross the 2000-kilometer border with Mexico. The vast majority of them, like the group near Yuma Monday, immediately surrender or seek out Border Patrol Agents to begin the asylum process.
The leader of the CBP Yuma border government, Anthony Porvaznik, said his unit needed better border barriers, but even more urgent was the funding of these families.
"This is our No. 1 challenge we have here in the Yuma sector is the humanitarian problem," said Porvaznik. "As I mentioned, 87 percent of the arrests are family units and unaccompanied extraterrestrial children."
The mass crossing this week took place in a sparsely populated section of the border – where an old place was The boundary barrier model rises about 5 meters from the sandy bottom. The stretched agency had only three agents patrolling this 26-mile border section.
Family treatment took hours, most of which were brought to the region's chronically overcrowded central processing center in Yuma.
"During my 30 years with the border patrol, I was not involved in the arrest of a group of 376 people," said Porvaznik. "That's really unheard of."
On Thursday, hundreds of asylum seekers were held in cinderblock cells with thick glass windows that skipped a central bullpen where CBP agents were working to manipulate them and meet humanitarian needs. The asylum seekers were divided into cells: fathers with sons, fathers with daughters, unaccompanied minors and mothers with children.
As with all of these facilities, CBP said it was working to get them up and running as fast as possible to ensure basic health care. Nevertheless, the prisoners eat, sleep and use the bathroom in the same room. Leftovers mingled with silvery ceilings on the floor. In a cell, several boys had rolled up the blankets into a makeshift football they pushed around.
One of the group's relatives said he left Guatemala eight days ago and taken the ride on his 12-year-old bus Old daughter They were planning to leave San Diego's designated machining center – the plane ticket in hand.
The father said he had saved about $ 5,000 to pay a coyote to push her to the limit. He left a wife and two younger daughters in Guatemala. Next to them, a mother and two daughters were on their way to Cincinnati, also from Guatemala. They also traveled by bus and the journey took about eight days.
Just two days after the group was tunneled under the border wall in Yuma, the Border Patrol opened another large group of migrants in New Mexico. The 247-strong group, including unaccompanied minors, was crossed near the Antelope Wells Port of Entry and immediately handed over to the authorities for processing.
According to CBP, 24 large groups – measured as 100 or more – have crossed the border near Lordsburg, New Mexico only since 1 October 2018.
ABC News "Ignacio Torres and Mark Osborne contributed to this report.
Editor's Note: This story has been updated to say inch and border guards.