Missing Malaysia Airlines plane: How were stolen passports used?

Two passengers on missing Malaysia Airlines flight MH370 were travelling on stolen passports, officials have confirmed.

The passengers - travelling with Italian and Austrian passports that had been stolen in Thailand - purchased their plane tickets at the same time, and were both booked on the same onward flight from Beijing to Europe on Saturday.

But how were they able to board the plane with the invalid documents?

Rob Broomby reports.