New evidence continues to point to deliberate acts in the case of missing Malaysia Airlines Flight 370. U.S. officials said Friday that the aircraft altered its course multiple times and changed its altitude significantly after losing contact with ground control, suggesting that it was still under control of a pilot or someone with aviation skills. Malaysian investigators also said that radar data indicates the jetliner was flown off course hundreds of miles deliberately, using coordinates normally employed for routes to the Middle East and Europe. An anonymous U.S. official told the AP that investigators are considering the possibility that the aircraft's disappearance may have been "an act of piracy" and that the plane could have landed somewhere. Among clues pointing to "human intervention," the official said, is that the Boeing 777's transponder and another messaging system on the plane were turned off at separate times.