Lawsuits are challenging President Trump’s abrupt decision to send men awaiting deportation to the American military base in Cuba.

Many of the migrants were being kept in a detention facility that has historically held suspected terrorists. They were flown back to Venezuela Thursday after a stop in Honduras.

A transfer operation on Thursday repatriated 177 Venezuelans via a handoff in Honduras, while one migrant was brought back to U.S. soil.

Officials at the Department of Homeland Security and the Defense Department are racing to set up multiple tent facilities in Guantanamo Bay, Cuba, to house thousands of migrants, but the scattered efforts have prompted questions internally about who’s in charge and what will happen once people arrive on site.

A plane carrying 177 Venezuelan migrants arrived in Venezuela on Thursday from Guantanamo as advocates file complaints over rights abuses in the camp.

Immigration and Customs Enforcement (ICE) officers have removed deported migrants from a facility on the U.S. military base in Guantánamo Bay, Cuba, where the Trump administration brought them as part of an effort to remove certain immigrants from the U.