ADEN, Yemen, Dec. 26 (Xinhua) -- Saudi warplanes on Friday carried out airstrikes on military sites affiliated with the Southern Transitional Council (STC) in Yemen's southeastern oil-rich province of Hadramout, a local security official told Xinhua. The official, speaking on condition of anonymity, said that "several airstrikes targeted positions of the Elite Hadrami security units aligned with the STC."