The restrictive media policy, however, is under debate within the two agencies. Some officials argue that more transparency would be beneficial because it would allow the public to see the extensive efforts made by government employees and contractors dealing with a spike in the number of migrants. Even images that document inadequacies at the facilities might be beneficial because they could help build popular support for more resettlement funding from Congress.

A DHS spokesman declined to comment. Customs and Border Protection officials didn’t reply to a request for comment.

Caitlin Dickerson, who covers immigration for the New York Times, said gaining access to the detention facilities – never easy under any circumstances – has gotten harder since December, when two children died in federal custody. (Since then, at least five more have died.) Dickerson isn’t sure if officials are intentionally barring reporters or if they’re simply unable to deal with an upsurge in the news media’s requests for entry.

In any case, she said, the press tours that officials have permitted are typically short and highly structured, with no interviews or follow-up allowed. Access is usually restricted to only part of a facility.

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Reporters on the beat say they often have to use indirect and secondary means to get information, including talking to contractors, adult relatives of the children and lawyers advocating for the children. An infamous audio recording of children wailing while held at one facility last year was obtained by a civil rights attorney and published by ProPublica.

“We’re doing our best as journalists with the information that’s available to us,” said Martha Mendoza, an Associated Press investigative reporter who broke last week’s story about the Clint facility with colleagues Cedar Attanasio and Garance Burke. “We’re using all the tools we can find to hold everyone accountable, which is what our role is.”

Burke said that the child-migrant issue predates the Trump administration and that “conditions for children held in custody have never been good.” The difference this time, she said, is there are more children than ever living under unhealthful conditions.

Burke and Mendoza last year obtained confidential government documents that revealed about 5,400 detained migrant children were in government-run or supervised shelters, almost twice the number of a year earlier. The two reporters were part of a team of AP journalists whose coverage became a finalist for the Pulitzer Prize this year in national reporting.

Their work suggests sunlight can have positive effects.

On Monday, four days after the AP reported on conditions at the Texas center, Border Patrol officials removed most of the children from it. Just 30 children remained at the facility, down from some 300 before the news stories emerged. Rep. Veronica Escobar, D-Texas, whose district covers El Paso, complained to Customs and Border Protection leadership following the news reports. She said most of the children had been moved to a temporary site nearby with rollout mattresses, showers, medical facilities and air conditioning.

In a statement emailed to the AP on Monday, the Border Patrol offered no apologies. “Our short-term holding facilities were not designed to hold vulnerable populations,” it said, “and we urgently need additional humanitarian funding to manage this crisis.”