Puerto Rico is joining a growing list of places in the U.S. opposed to becoming the future home of any Guantanamo Bay prisoners.

President Barack Obama said last week that he would close the prison on a U.S. base in Cuba within a year. The U.S. is scouting out locations to put prisoners who won't be immediately released.

A spokeswoman for Puerto Rican Gov. Luis Fortuno, Michelle Cuevas, said Tuesday that he would oppose any proposal to hold them in the U.S. island territory.

His comment came a day after the island's nonvoting member of Congress also voiced his opposition, echoing statements by officials in several U.S. states, including California and Kansas.

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