Greek archaeologists have unearthed the fortifications of a 2,350-year-old city on Crete marked by extensive signs of siege, Culture Ministry officials said yesterday. The archaeologists discovered the remains of a fortified tower, a city gate and a 3.5-kilometer (2.2-mile) wall surrounding the ancient city of Aptera, near the port of Hania and dating to 4 BC, the ministry said. Of particular importance to research were signs of battle from the post-Classical era, and the discovery of newborn infants buried near the tower.