NEW : Airways ' records show nothing to indicate sudden departure was preplanned . Every one of the five people on board is both a possible victim and suspect . The plane 's pilots have become one obvious area of concern . The official emphasized that no final conclusions have been drawn and that all the internal intelligence discussions are based on preliminary assessments of what is known to date . A 29-year - old Malaysian civil aviation engineer is also under the spotlight .
NEW : Airways ' records show nothing to indicate sudden departure was preplanned . Every one of the five people on board is both a possible victim and suspect . The plane 's pilots have become one obvious area of concern . A 29-year - old Malaysian civil aviation engineer is also under the spotlight .