An estimated half a million migrants have walked to their villages from India's big cities since India's 21-day lockdown began. The journey has been fatal for some.
The Homestead, Florida, facility had been criticized for its "prison-like conditions."
Nebane Abienwi, 37, from Cameroon had a "hypertensive event," U.S. Immigration and Customs Enforcement said.
President Donald Trump reportedly suggested a series of brutal and illegal actions to prevent migrants from crossing the border.
The vast majority of the cases began while migrants were detained, not beforehand.
The Trump administration wants to throw out the 1997 Flores settlement and allow immigration officials to hold migrant children for longer than 20 days.
Aaron Hull, head of the Border Patrol sector in El Paso, Texas, has been transferred to Detroit amid controversy over conditions for detained children.
Rep. Alexandria Ocasio-Cortez (D-NY) questioned the acting head of DHS over a secret, racist Facebook group that featured photoshopped images of the congresswoman being raped.
President Donald Trump has announced a new crackdown on protections for asylum seekers.
"I mean, they're being fed," said Ken Cuccinelli, acting director of the Citizenship and Immigration Services office.