More questions continue to arise regarding the fate of Malaysia Airlines Flight MH370, a Boeing 777-200 bound from Kuala Lumpur, Malaysia, to Beijing, which vanished from the skies 1:40 a.m. local time on Saturday, two hours after departure.

While search-and-rescue teams dispatched by Malaysia, Vietnam, Singapore, the Philippines, China, New Zealand, Thailand, Indonesia and the United States continue to search for the aircraft, authorities have also turned their attention towards two passengers who boarded the flight with stolen passports belonging to Italian and Austrian citizens.

The two passengers in question were among the 227, plus 12 crew, listed as being carried by the plane. They flew under the names of Christian Kozel of Austria and Luigi Maraldi of Italy, which appear among the list of passengers released by Malaysia Airlines.

However, Kozel and Maraldi had reported the passports stolen in Thailand sometime in 2012 and 2013, according to Lyon, France-based Interpol.

The stolen documents used to board MH370 are a particular concern for authorities investigating MH370, since the passports were also recorded in Interpol’s Stolen and Lost Travel Documents (SLTD) database. However, authorities hesitate to speculate on any connection between the stolen passports and the fate of Flight MH370.

In the meantime, Malaysia’s Department of Civil Aviation (DCA) continues to coordinate search efforts with the Ministry of Transport and the multi-national search-and-rescue teams. According to a statement released by Malaysia Airlines, the airline is also making flight arrangements for the families of the missing passengers of Flight MH370 to Kuala Lumpur.

Read the full passenger manifest of Malaysia Airlines Flight MH370 below. (Last names are listed first. The suffix "MR" and "MS" appearing after some names indicates male or female, while "CHD" means child.)