A little girl from Panama born with heart problems died in Border Patrol custody Wednesday, the second death of a child from Latin America in US government custody in two weeks.

The 8-year-old girl and her family were being held in Harlingen, Texas, in the Rio Grande Valley, one of the busiest corridors for migrant crossings, the Border Patrol’s parent agency, US Customs and Border Protection said. The agency has struggled with overcrowding at its facilities, spurred by a large increase in migrants ahead of the expiration last week of a key regulation on immigration linked to the Covid-19 pandemic.

The girl experienced " a medical emergency " and emergency medical services were called. They took her to the hospital where she was pronounced dead, the agency said.

An autopsy has been ordered, said Jesus T. “Chuy” Garcia, Jr, the local judge presiding in the case.

The girl’s name was Anadith Tanay Reyes Alvarez, said Honduran Consul José Leonardo Navas, who is based in McAllen, Texas. He said she is from Panama, although her parents are from Honduras. The consul said that she was travelling with her father, mother and two older siblings.

She was born with heart problems and was operated on three years ago in Panama, according to her father who spoke with the consul.

Migrants talk to officials along a road near the Rio Grande after crossing the Texas-Mexico border. Photo / AP

Customs and Border Protection’s internal affairs office will investigate the girls’ death in Texas, and the Homeland Security Department’s inspector general and Harlingen police have been notified, Customs and Border Protection said. Larry Moore, a spokesman for the Harlingen Police Department, said he had no information about the death.

Her death comes a week after a 17-year-old Honduran boy, Ángel Eduardo Maradiaga Espinoza, who was travelling alone, died in US Health and Human Services Department custody.

In recent weeks the US has struggled with large numbers of migrants coming to the border in expectation of the end of Title 42, a regulation that had curbed migration during the pandemic.

Last week, the Border Patrol began releasing migrants in the US without notices to appear in immigration court, instead directing them to report to an immigration office within 60 days. The move spares Border Patrol agents time-consuming processing duties, allowing them to open space in holding facilities. A federal judge in Florida ordered an end to the quick releases.

The Border Patrol had 28,717 people in custody on May 10, the day before pandemic-related asylum restrictions expired, which was double from two weeks earlier, according to a court filing. By Sunday, the number had dropped 23% to 22,259, still unusually high.

The Border Patrol has a network of stations and processing facilities across the southwest border where it holds and processes migrants agents encounter before they’re either released into the US or turned over to Immigration and Customs Enforcement. On its website, the agency says it has a maximum capacity of 5,000 although the agency has been rapidly expanding capacity in recent months.

The average time in custody on Sunday was 77 hours, five hours more than the maximum allowed under agency policy.

During the Trump administration, the deaths of children in US custody became flashpoints of controversy, calling into question the administration’s efforts to protect the most vulnerable migrants at a time when the US was seeing a rise in the number of families with children coming to the southern border.

In December of 2018, a 7-year-old girl, Jakelin Amei Rosmery Caal Maquin, died after being picked up by US Border Patrol authorities in a remote section of New Mexico after she had crossed the border with her father.

Just a few weeks later, another boy from Guatemala — Felipe Gomez Alonzo — died on Christmas Eve after being apprehended with his father a week earlier in Texas.

Juan de León Gutiérrez, 16, died on April 30 after officials noticed he was sick at a youth detention facility operated by the US Department of Health and Human Services. The medical examiner in Corpus Christi, Texas, said Juan had been diagnosed with a rare condition known as Pott’s puffy tumour, which can be caused by a severe sinus infection or head trauma.

Migrants use a raft to cross the Rio Grande at the Texas-Mexico border. Photo / AP

In May a 2 1/2-year-old boy died after several weeks in the hospital. Wilmer Josue Ramirez Vasquez had been struggling with a high fever and difficulty breathing, and authorities took him to a children’s hospital where he was diagnosed with pneumonia.

Then, later in May 2019, a 16-year-old Guatemala migrant died in US custody. Carlos Gregorio Hernandez Vasquez had been held by immigration authorities for six days — twice as long as federal law generally permits — then transferred to another holding facility even after he was diagnosed with the flu.

Later in 2019, Health and Human Services said a 10-year-old girl, Darlyn Cristabel Cordova-Valle, had died the year before in US custody.

- Valerie Gonzalez and Rebecca Santana, AP