Mexican Air Force pilots filmed 11 unidentified flying objects in the skies over southern Campeche state, a spokesman for Mexico's Defense Department . The lights were filmed on March 5 by pilots using infrared equipment. They appeared to be flying at an altitude of about 11,500 feet, and reportedly surrounded the jet as it conducted routine anti-drug trafficking vigilance in Campeche. Only three of the objects showed up on the plane's radar.