This transcript has been automatically generated and may not be 100% accurate.

in trying to figure out what happened to Malaysia Airlines flight three seventy ... Wall Street to reports investigators are focusing on sabotage ... inside you know possibly beyond the Boeing seven seven stock ... Malaysian officials say it with high certainty ... that two of the plane's navigation systems were disabled and U S officials are considering the possibility that a third Woking on the plains along word that was also copper mines it's believed the posting taken out was the transponder official suspect that Iran an hour into the flight ... someone the cockpit shut off the transponder system that helps radar identified the aircraft ... fully disabling the transponder would require unplugging circuits ... located above and behind the pilot's seat ... rarely if ever need to access the circuit breakers in the ensuing minutes is also suspected ... a second piece of equipment known as ... a car's part of the flight management system was disabled ... showing that off would require a set of keystrokes the requires expert knowledge ... but I necessarily of that particular aircraft model ... investigators suspect the plane continued flying after these two sisters were shut off ... for least another five hours ... that's based on the satellite painting once per hour ... the plane's location altitude and speed after the final thing ... is suspected one of two things happened ... the most likely scenario according to officials ... the plane crashed ... over after the final game the plane had enough fuel to continue flying through least another hour or ... so technically possible that someone at some point ... caught the satellite communication that would potentially be a two person operation ... one person to fly the plane ... the other to going to have been ... going down the hatch to the lower deck ... with electronics Bay is located ... and turning off the plane's final communications link ... what actually happened is likely to remain a mystery ... until investigators access and the Sri seventies black box that was what we may also Lauren with the plane's passengers most of whom may have been sleeping ... had any clue their flight was something other than normal ...