The probe, based on reports, statistics and internal audits of the U.S. Office of Justice Program and ICE, indicated that the abuses mainly were against women and took place in ICE detention centers, where migrants "should have been held" until their immigration status could be determined and their cases processed.

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According to the investigation, most violations occurred in dormitories in ICE detention centers, many of which are run by private companies accused by human rights organizations of profiting from migrants and failing to guarantee dignified conditions, as well as in buses transporting migrants to Mexico.

The newspaper accessed 97 audits of detention facilities, in which the U.S. Department of Justice found that between 2017 and 2021, abuses by ICE agents were constant.

In its latest report on sexual abuse in prisons, the department revealed that 591 people had been sexually abused in its migrant detention centers in the last six years.

However, Milenio asserted that the figure could be underreported because, during the COVID-19 pandemic, the counts were carried out intermittently, according to lawsuits that the newspaper could access.

One of the cases the investigation exposed was of a Mexican woman who was raped along with two other migrant women by three alleged U.S. agents in a detention center in Texas and later became pregnant.

"The stories are brutal and show that some immigration agents enter the areas where migrant women are detained and force them to take off their clothes for supposed searches and then abuse them," the report said.

It also underlined that "few cases reach the courts," while several migrant protection organizations have condemned the fact that "impunity prevails."

"Vulnerability has prevented many people from filing formal complaints for fear of reprisals," the investigation concluded.