reporter: malaysian police are now looking at three areas, hijacking, sabotage, and psychological or personal problems with the passengers or crew. was there someone unauthorized in the cockpit, ordered the transresponder turned off, ordered the plane a 90-degree turn off course? did one of the pilots do it themselves. reporter: authorities now say they ve identified the two passengers traveling on stolen passports. they re not believed to have any ties to terror. one of the passengers, 18-year-old pouria nour mahammad mehrdad was trying to get to germany where his mother lived. the other was delavar syed mohammad reza. malaysian officials have been asked about in-flight protocol and say cockpit doors are always kept closed during flight. one woman told an australian news magazine the copilot of the missing plane allowed her and a friend in the cockpit in 2011. they say they were in the