A document said to link Austrian President Kurt Waldheim to Nazi war crimes is a fake, and a forgery investigation is under way, the state news agency Tanjug reported in Belgrade. The document, purporting to be a telegram advising that a Lt. Kurt Waldheim requested the deportation of over 4,000 Yugoslav civilians during World War II was published by the West German magazine Der Spiegel last week. Tanjug said: "A commission of historians, archivists and other experts, formed by the competent Yugoslav organs, has reached the conclusion that the telegram is not an authentic document. . . ."