` ` We have not been able to locate anything , '' an airline official says . Passenger manifest questioned . Thai law enforcement sources say both passports were stolen in Thailand . One of the two stolen passports is listed in Vietnam 's database , sources say . Vietnamese searchers searched oil platforms in the South China Sea .
` ` We have not been able to locate anything , '' an airline official says . Thai law enforcement sources say both passports were stolen in Thailand . One of the two stolen passports is listed in Vietnam 's database , sources say . Vietnamese searchers searched oil platforms in the South China Sea .