Uruguay's president says the United States has guaranteed that six former Guantanamo Bay prisoners who arrived in Uruguay as refugees are not terrorists.

Jose Mujica on Tuesday showed a document from the U.S. State Department saying there's no information that "the men were involved in conducting or facilitating terrorist activities" against the U.S., its partners or allies.

Members of Uruguay's opposition had requested the release of the documents.

The six men are free and staying at a Montevideo house as guests of a major labor union.

They were detained as suspected militants with ties to al-Qaeda in 2002 but were never charged. They had been cleared for release since 2009 but could not be sent home and the U.S. struggled to find countries willing to take them.