Suspected fragments from the missing Malaysia Airlines plane
carrying 239 people have been found off Vietnam.
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.
