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Law enforcement officials in Uruguay are scrambling after a former Guantanamo Bay detainee seemingly vanished into thin air.

Jihad Ahmed Mustafa Dhiab, a Syrian national who was released from Gitmo to Uruguay in 2014, is believed to have disappeared across the border to Brazil.

It is not known if Dhiab, who was supposed to be under strict surveillance by the Uruguayan government, crossed into Brazil with the appropriate legal documents.

“We are coordinating with officials in Brazil and Uruguay to determine his whereabouts,” an unnamed U.S. official told The Washington Post.

Diab was reportedly captured in Pakistan in 2002, spending the next 12 years at Guantanamo Bay.

In December 2014, Dhiab and five other prisoners of Middle Eastern and North African origin were transferred to Uruguay, as part of a deal between the U.S. and Uruguay to resettle detainees seen as posing little threat.

Brazilian authorities, as well as the White House, have declined to comment.

Watch the "Fox and Friends Weekend" report above.

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