Australian authorities looking for the missing Malaysia Airlines jet said Thursday that an oil slick detected in the search zone and collected by an Australian vessel was not engine oil or hydraulic fluid from an aircraft. The morning attack outside the city of Mosul, started with a suicide bomber who detonated his truck packed with explosives at the gates of the facility, an army officer said. French Special Forces backed by helicopters led a pre-dawn operation in northern Mali Thursday and freed five humanitarian aid workers who had been held captive by a "terrorist group" - killing about 10 of the alleged militants, officials said. French forces intercepted two pickup trucks carrying the hostage-takers and their captors north of the historic city of Timbuktu, one of three major towns in a vast region on the Sahara's southern rim where the five went missing Feb.