[Mowlid Isman, 28, from Somalia, left, speaks as Muaz Mahmud, 25, from Ethiopia looks on during a press conference organized by non-governmental organizations in Athens, Thursday, April 21, 2016. The two men say they are survivors from a shipwreck last week in the Mediterranean Sea that international groups say left as many as 500 people feared dead. (AP Photo/Theodora Tongas)]ATHENS, Greece (AP) — Two men who were among 41 people picked up over the weekend from a boat found adrift in the Mediterranean Sea described on Thursday surviving what they say was a shipwreck that might have killed up to 500 people.