Turner Enterprises spokesman Phillip Evans in Atlanta said the CNN founder was hospitalized in South America and that "no further details will be provided."
CNN's news desk, however, tweeted that Turner was "under observation" today at a hospital in Buenos Aires.
A security guard at the Instituto Argentino de Diagnostico y Tratamiento confirmed to The Associated Press that Turner was hospitalised there. Speaking on condition of anonymity because of hospital policy, he said the institute's director told him that Turner's companions had asked to release no information about his condition.