Last contact with the Yemeni freighter was November 15 . only one of ships have been attacked by pirates in the Gulf of Aden . Report : The last contact with the ship was late last week , and it was unclear exactly when the hijacking took place , said Andrew Mwangura , the head of Kenya Seafarers Association . No ransom figure yet for hijacked Yemeni supertanker . Pirates seized the Sirius Star on late last week .
Last contact with the Yemeni freighter was November 15 . only one of ships have been attacked by pirates in the Gulf of Aden . Report : No ransom figure yet for hijacked Yemeni supertanker . Pirates seized the Sirius Star on late last week .