The 323 meter long, 99678 dwt container ship OOCL Southampton collided with the 98 meter long freighter Hang Sheng 18 off the coast of Hong Kong.  The OOCL Southampton struck into the Hang Sheng 18 which sank soon after.   All 12 crewmen of the Hang Sheng 18 were later rescued by other nearby vessels.   An oil sheen was spotted over where the freighter sank.   The OOCL Southampton proceeded to a nearby anchorage.  No further details reported.