Electronic booking records show that one-way tickets with those names were issued Thursday from a travel agency in the beach resort of Pattaya in eastern Thailand.
Thai police Col. Supachai Phuykaeokam said those reservations were placed with the agency by a second travel agency in Pattaya, Grand Horizon.
Thai police and Interpol officers questioned the owners. Officials at Grand Horizon refused to talk to The Associated Press.
Police Lt. Col. Ratchthapong Tia-sood said the travel agency was contacted by an Iranian man known only as "Mr. Ali" to book the tickets for the two men.
"We have to look further into this Mr. Ali's identity because it's almost a tradition to use an alias when doing business around here," he said.
The travel agency's owner, Benjaporn Krutnait, told The Financial Times she believed Mr. Ali was not connected to terrorism because he had asked for cheapest tickets to Europe and did not specify the Kuala Lumpur to Beijing flight.
Malaysia's police chief was quoted by local media as saying that one of the two men had been identified - something that could speed up the investigation.
Civil aviation chief Azharuddin Abdul Rahman declined to confirm this, but said they were of "non-Asian" appearance, adding that authorities were looking at the possibility the men were connected to a stolen passport syndicate.
