The mother of the 8-year-old girl who died after a “medical emergency” in U.S. Border Patrol custody in Texas said officials ignored repeated pleas from her family to hospitalize the girl, who had existing health problems and was experiencing pain and difficulty breathing.

The girl, Anadith Tanay Reyes Alvarez, died Wednesday. She was from Panama and was traveling with her parents, who were from Honduras, and two older siblings, Honduran Consul José Leonardo Navas told The Associated Press. They were in custody at Harlingen Station in the Rio Grande Valley, minutes from the border with Mexico.

U.S. Customs and Border Protection said emergency medical services were called and took the girl to a hospital, where she was pronounced dead. Roderick Kise, a spokesperson for the agency, said he could not comment beyond the initial statement because the death was the subject of an open investigation.

The girl’s mother, Mabel Alvarez Benedicks, told The Associated Press in an interview that agents knew the girl had a history of sickle cell anemia and heart problems, including an operation three years ago.

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Mother: Agents said daughter did not require hospital care

Alvarez Benedicks said agents told her that her daughter’s diagnosis of influenza did not require hospital care, despite the family’s pleas for more treatment. Alvarez Benedicks said her daughter’s bones were in pain, she couldn’t walk, and she struggled to breathe.

“They killed my daughter, because she was nearly a day and a half without being able to breathe,” she said. “She cried and begged for her life and they ignored her. They didn’t do anything for her.”

Alvarez Benedicks said Anadith had a fever and headache, and when she reported the girl’s bone pain to an agent, he said the mother should give her water and that the pains were because she was growing up. She asked for an ambulance but was denied, she said.