The 74 meter long, 2772 dwt freighter Erol Senkaya capsized off Zakynthos, Greece.   The Erol Senkaya, loaded with 2200 tons of olive pits, was headed for Zakynthos when the cargo shifted causing the vessel to overturn some 10 miles offshore.   The master along with three crewmen were killed.   Six other crewmen were later saved by rescue vessels.  There is some concern that some pollution will be released from the 10 tons of fuel oil still on board the Erol Senkaya. Authorities have launched an investigation into the incident.