In a letter to Education Minister Andrei Fursenko, Deputy Prosecutor-General Sergei Fridinsky said all 12 had failed to report on the living conditions of the adoptees once in the United States.
Russian lawmakers and government officials have in recent years threatened to toughen adoption laws, claiming that children adopted by foreigners are often ill-treated. Critics in turn argue that toughening regulations would be detrimental to the thousands of children who are awaiting adoption in poorly equipped Russian orphanages.