As the search for the plane entered into fourth day today with no clue so far, police said they are also "looking into four areas: hijacking, sabotage, psychological problems of the passengers and the crew, and personal problems among the passengers and the crew" to solve the mystery.
Speaking to reporters, Inspector-General of Police Khalid Abu Bakar said they were looking at all angles and studying behavioural patterns of those on board the aircraft. He said that Federal CID director Commander Hadi Ho Abdullah would lead a team to investigate these four areas.
He said police here had not received any prior intelligence in regard to terrorism.
