First time I've heard this story-

Full story; http://crimsondreams.net/

A new book details the history of a mysterious group of human looking extraterrestrials that established underground bases in Italy and met with local residents between 1956 and 1978. The author of Mass Contact, Stefano Breccia, is a well regarded Italian UFOLogist with an electrical engineering background who has taught at several Italian and foreign universities. He investigated the Amicizia (Friendship) case over a period of several decades during which he got to meet and question many of the primary witnesses. In the book, Breccia includes the testimony of Bruno Sammaciccia, a highly qualified Italian scholar with degrees in psychology and psychiatry, and author of 160 books. Sammaciccia’s testimony contains his claims of direct physical contact with extraterrestrials over several decades...