A 16-year-old Guatemalan boy died while in Border Patrol custody on Monday, officials said. The boy was apprehended while crossing the border in Texas last week, and was transferred to a border patrol station while officials worked to place him in a shelter for migrant youth. He is the fourth Guatemalan child since December to die while in U.S. custody. The cause of death is not known; the boy was found unresponsive during a welfare check on Monday morning. John Sanders, acting Customs and Border Protection commissioner, said the agency is "saddened by the tragic loss of this young man," and said CBP "is committed to the health, safety and humane treatment of those in our custody." The case is under review.

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