The UN high commissioner for refugees says the policy is "unacceptable".
Laredo Sector Assistant Chief Patrol Agent Jose Martinez says, "This event is an example of the outcome possible when the Border Patrol combines forces with our law enforcement partners to disrupt and dismantle human smuggling organizations".
The White House, however, has signaled it's using separating children from their parents to negotiate with Democrats on the issue of immigration. The agent stopped one of the vehicles and radioed in a description of the other two and another border patrol agent stopped another vehicle that was part of the suspicious convoy, according to the statement. "What's missing is a conductor".
Almost 2000 children were taken from their parents over a six-week period in April and May after US Attorney-General Jeff Sessions announced a "zero tolerance" policy when it comes to prosecuting those arrested for illegally entering the country. "The driver of this vehicle, we have handled before". "We are doing none of those things".
"You look at what's happening in Europe, you look at what's happening in other places. Reunite the families at the border and we can talk about father's day". Over a six-week period ending in May, about 2,000 children had been separated from their families, administration officials said Friday.
The conversations are conducted in Spanish, with government employees asking children where they're from and who they were with before arriving at the facility. Under the Obama administration, agents had discretion in cases of immigrants with gravely sick children. She said gangs were everywhere in El Salvador: "They're on the buses".
Q. Are immigrant children being held on the border - where temperatures often climb past 100 in the summer - in tents? The parents are also allowed to see their children before they leave for court and detention, officials said.
Most congressional Republicans, however, have declined to criticise Mr Trump over the policy. The Democrats have to change their law.
During a heated briefing at the White House, Ms Nielsen also insisted that migrants who attempt to cross the United States border were putting their children in an unsafe situation.
CNN's Dianne Gallagher reported that families are brought through the warehouse and separated by the adults' gender and that one woman approached CNN, crying and expressing fear about what would happen next.