Who are the oldest people in the Balkans?

In the study of the history of the Balkans, a very interesting question appears: Who are the oldest people in the Balkans?  Ancient tablets found in South Balkans (Bulgaria) are written in the oldest European script found ever, German scientists say.  The tablets, unearthed near the Southern town of Kardzhali, are over 35-centuries old, and bear the ancient script of the Cretan (Minoan) civilization, according to scientists from the University of Heidelberg, who examined the foundings. This is the Cretan writing, also known as Linear A script, which dates back to XV-XIV century B.C.