Interpol secretary general has said he believes the disappearance of the Malaysia Airlines plane is not a terrorist incident.
"The more information we get, the more we are inclined to conclude it is not a terrorist incident," Ronald Noble said.
He said the two men had swapped their passports in Kuala Lumpur to use stolen Austrian and Italian passports to board the missing flight.
A mother has described her frustration as she waits for answers on the fate of her missing son who is on board the missing Malaysia plane.
Malaysia's military believes a jetliner missing for almost four days turned and flew hundreds of kilometres to the west.
The wife of a passenger travelling on the missing Malaysia Airlines flight has spoken of her struggle to cope as she waits for news.