Yemin Coast guard said to free tanker: The coast guard of Yemen has freed a hijacked Yemeni oil tanker and arrested 11 Somali pirates, the first time the country has successfully retaken a seized vessel, a security official said.The coast guard exchanged gunfire with the pirates and took control of the oil tanker Qana on Sunday, the official said.The vessel had been hijacked earlier in the day while between the two southern Yemeni ports of Mukalla and Aden.The security official spoke on condition of anonymity because he was not authorized to speak to the media.