Athens - Greece's Culture Ministry has warned against "overbold" speculation that an ancient artificial mound being excavated could contain a royal Macedonian grave or even Alexander the Great.
Site archaeologist Aikaterini Peristeri has voiced hopes of finding "a significant individual or individuals" within.
Greek websites enthused that it could hold the long-sought grave of fourth-century BCE (Before Common Era) warrior-king Alexander the Great - thought to lie in Egypt.
A Culture Ministry statement on Thursday said the partly-excavated mound has yielded a "very remarkable" marble-faced wall from the late fourth century BCE. It is an impressive 500m long and 3m high.
But the ministry warned it would be "overbold" to link the site near ancient Amphipolis, 600km north of Athens, with "historic personages" before the excavation is completed.