The disappearance of Malaysia Airlines Flight MH370 was most likely not due to a terrorist attack, the secretary-general of international police agency Interpol said Tuesday.
"The more information we get, the more we are inclined to conclude it is not a terrorist incident," Ronald K. Noble told reporters.
"The focus of the world right now and of law enforcement … should be on trying to find the plane and hopefully find survivors, as difficult as they might be to believe that might occur, and to helping support the investigation on the ground," he said of the 239 people aboard.
He said the two passengers with stolen passports were Iranians who had swapped their passports in Kuala Lumpur and used stolen Italian and Austrian passports to board the missing plane.
Noble's news conference came hours after Malaysia's police chief said the investigation into the missing Malaysian Airlines flight was focused on four main areas that include personal and psychological problems, as the search effort for the missing jet expanded its reach.
Inspector General Khalid Abu Bakar identified one of the individuals with a stolen passport as Pouria Nour Mohammad Mehrdad. The police chief said he was unlikely to have links to a terrorist group and was probably migrating to Germany.
Noble identified the other Iranian as Delavar Seyedmohammaderza, 29.
Both bought their tickets in Thailand and entered Malaysia together, The Associated Press reported.
The airline says the pilots did not send any distress signals, suggesting a sudden and possibly catastrophic incident. Speculation has ranged widely about possible causes, including pilot error, plane malfunction, hijacking and terrorism.