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.

The Trump administration has flown all of the migrants it had held in Guantánamo Bay out of the facility there, NBC News has learned from three sources familiar with the operation and flight data.

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.