WASHINGTON >> President Donald Trump on Wednesday signed the Laken Riley Act into law, giving federal authorities broader power to deport immigrants in the U.S. illegally who have been accused of crimes. He also announced at the ceremony that his administration planned to send the “worst criminal aliens” to a detention center in Guantanamo Bay, Cuba. The bipartisan act, the first piece of legislation approved during Trump’s second term, was named for Riley, a 22-year-old Georgia nursing student who was slain last year by a Venezuelan man in the U.S. illegally.

“She was a light of warmth and kindness,” Trump said during a ceremony that included Riley’s parents and sister. “It’s a tremendous tribute to your daughter what’s taking place today, that’s all I can say. It’s so sad we have to be doing it.”

Trump has promised to drastically increase deportations, but he also said at the signing that some of the people being sent back to their home countries couldn’t be counted on to stay there.

“Some of them are so bad that we don’t even trust the countries to hold them because we don’t want them coming back, so we’re gonna send ‘em out to Guantanamo,” Trump said. He said that he’d direct federal officials to get facilities in Cuba ready to receive immigrant criminals.

“We have 30,000 beds in Guantanamo to detain the worst criminal aliens threatening the American people,” he said.

The White House announced later that Trump had signed a presidential memorandum on Guantanamo. Migrant rights groups quickly expressed dismay.

“Guantanamo Bay’s abusive history speaks for itself and in no uncertain terms will put people’s physical and mental health in jeopardy,” Stacy Suh, program director of Detention Watch Network, said in a statement.

Trump said the move would double U.S. detention lockup capacities, and Guantanamo is “a tough place to get out of.”

The Guantanamo facility could hold “dangerous criminals” and people who are “hard to deport,” said a Trump administration official speaking on condition of anonymity because they weren’t authorized to speak publicly on the matter.

Homeland Security Secretary Kristi Noem said the administration would seek funding via spending bills Congress will eventually consider. The administration’s border czar, Tom Homan, said U.S. Customs and Immigration Enforcement would run the facility in Cuba and that the “the worst of the worst” could go there.

The U.S. has leased Guantanamo land from Cuba for more than a century. Cuba opposes the lease and typically rejects the nominal U.S. rent payments. Cuban President Miguel Díaz-Canel said Trump wanting to ship immigrants to the island is “an act of brutality.”