Somali pirates seized control of a chemical tanker in the Gulf of Aden on Friday and a NATO helicopter gunship, too late to prevent the hijacking, picked up three security guards who jumped into the sea.

From CNN.com:

Pirates are believed to have anchored a hijacked supertanker carrying up to $100 million worth of crude oil off Somalia Tuesday, its operator has said, as more ships in the region have been boarded and taken over.