AMPHIPOLIS, Greece (AP) — Archaeologists excavating an ancient mound in northern Greece have uncovered what appears to be the entrance to an important tomb from about the end of the reign of warrior-king Alexander the Great, officials said yesterday.

Prime Minister Antonis Samaras, who visited the tightly guarded site yesterday, said the discovery “is clearly extremely important” and dates between 325 and 300 BC.

Alexander, who started from the northern Greek region of Macedonia to build an empire stretching as far as India, died in 323 BC and was buried in Egypt. His fellow royals were traditionally interred in a cemetery near Vergina, far to the west, where the lavishly furnished tomb of Alexander’s father, Philip II, was discovered in the 1970s.

But archaeologists believe the apparently unlooted Amphipolis grave, which is surrounded by a surprisingly long and well-built wall with courses of marble decorations, may have belonged to a senior ancient official.

Excavator Katerina Peristeri has argued that the mound was originally topped by a large stone lion that was unearthed a century ago some five kilometres from the site. In the past, the lion has been associated with Laomedon of Mytilene, one of Alexander’s military commanders who became governor of Syria after the king’s death.

“The excavation will answer the crucial question of who was buried inside,” Samaras said.

The tomb is expected to be opened in the next two weeks.