(CNN) -- There is no evidence to suggest that the two men who used stolen passports to get aboard Malaysia Airlines Flight 370 had anything to do with its disappearance Saturday as it was flying from Kuala Lumpur to Beijing, an official said Tuesday. 

"The more information we get, the more we're inclined to conclude that it was not a terrorist incident," Interpol Secretary General Ronald Noble told reporters Tuesday at his organization's headquarters in Lyon, France. 

Here's what we know about what happened, how it happened and why. 

WHO ARE THEY? 

The passengers are Delavar Seyed Mohammad Reza, 29, and Pouri Nourmohammadi, 18. 

They entered Malaysia on February 28 using valid Iranian passports. 

CNN obtained an iReport photo of what appears to be the two men with two of their friends. Metadata from the photo indicates that it was shot with an iPhone at 8:20 p.m. the night before the plane departed. CNN has blurred the faces of the other two men to protect their identities. 

WHAT HAPPENED? 

To fly out of Malaysia, Reza and Nourmohammadi used passports that were stolen in Thailand, a booming market for stolen passports. The passports belonged to citizens of Italy and Austria. 

"Thailand remains a robust venue for the sale of high-quality, false passports (which includes altered, stolen passports) and other supporting documentation," said Paul Quaglia, who has been working in the region as a security and risk analyst for 14 years. 

The Italian, Luigi Maraldi, 37, told reporters he reported his passport stolen in August. The Austrian, Christian Kozel, 30, had his stolen in July 2013. 
How old was the oldest one?
Delavar Seyed Mohammad Reza, 29