A tanker owners' group has urged governments to do more to combat piracy in the Indian Ocean, saying hijackings could disrupt global oil supplies.
It said Somali pirates were now using at least 20 seized vessels as mother ships to launch attacks in the region.
The warning follows the latest hijacking by of a supertanker carrying some $200m (£125m) worth of crude oil off the coast of Oman.
The Irene SL was on its way from the Gulf to the US when it was attacked.
http://www.bbc.co.uk/news/world-africa-12412488
Note: Update Record, 10 February 2011 Last updated at 00:12 GMT