The Iran interest section is under the protection of Pakistan's embassy in Washington, but housed in a different building and run by Iranians.

BBC: Stills from footage of "Mr Amiri"

Gonzalez, who had dual Cuban and American citizenship, arrived Monday at the U.S. Interest Section in Havana to renounce his citizenship surrounded by his family and U.S. attorney.

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In Havana, Lynn Roche, an official with the U.S. Interest Section, said section officials couldn't discuss any case of an American who hasn't signed a privacy act waiver.

CNN: Search for U.S. couple, their missing sons focuses on Cuba