An 8-year-old Guatemalan child detained by US Customs and Border Protection has died at a hospital in New Mexico, the agency reported.
On Monday, the boy and his father were taken to the Gerald Champion Regional Medical Center in Alamogordo, New Mexico, after a border patrol agent observed that the boy was sick.
According to the ministry, the boy and his father entered the United States via El Paso, Texas, on December 18 and were transferred to a border patrol station in Alamogordo on December 23.
CBP said an official cause of death has not yet been determined.
According to U.S. Customs and Border Protection (CBP), the unidentified boy died early Tuesday after showing "signs of potential illness" on Monday.
CBP promised "an independent and thorough review of the circumstances". Officials said more information would be released shortly.
A Guatemalan girl, 7, died earlier this month after being apprehended by border agents.
A CBP spokesman declined to elaborate, but said more details would be released shortly.
"He's been very clear, very consistent that his daughter was healthy, and his daughter very much wanted to come with him", said Ruben Garcia, founder and executive director of Annunciation House, an El Paso-based nonprofit that aids migrants.
CBP announced new notification procedures in response to Jakelin's death, which was not revealed until several days later. The body of Jakelin Caal was returned to her family's remote village Monday.
The symptoms the 8-year-old boy exhibited are similar to the ones Jakelin manifested before she died.
Her death fueled criticism of President Donald Trump's immigration policies from Democrats and migrant advocates. It was not immediately known if the watchdog would open an investigation into the boy's death.
The child, who has not yet been named, is the second migrant child to have died in United States detention this month.