Investigators say they are looking into the background of one of
the passengers on board the missing Malaysia Airlines plane.
The 29-year-old's apparent experience means he would have a knowledge of in-flight computer systems and be able to carry out repairs.
However, as an engineer specialising in executive jets, he would not necessarily have had the skills required to divert and fly a Boeing 777.
A senior police official with knowledge of the investigation said: "The focus is on anyone who might have had aviation skills on that plane."
