Interpol says at least two passports used on the Boeing 777-200 were stolen and it is "examining additional suspect passports".Suspected fragments from the missing Malaysia Airlines plane carrying 239 people have been found off Vietnam.
The Vietnamese navy said an object, thought to be an aircraft door, was spotted by a rescue plane off the country's south coast.
Security services are investigating whether the Boeing 777-200 was destroyed in a terror attack.
Interpol said at least two passports used on the flight were stolen and it is "examining additional suspect passports".
The international police agency said it was of "great concern" that passengers were able to board the plane using stolen passports, and no checks were made against its database.
Flight MH370 disappeared almost two days ago off Vietnam's south coast.
The search area has been widened after radar data
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