The men have been identified as Ahmed Mohamed Nasser al-Soofi and Hezam al-Murisi. Soofi is reportedly from Yemen.
They were arrested at the request of American authorities, and the investigation is still going on.
The men were apparently allowed to board a United Airlines flight from Chicago, Illinois to Amsterdam despite a slew of security concerns, beginning in Birmingham, Alabama, where Soofi appears to have started his journey.
Soofi was reportedly stopped at the airport, where the screening process was on, because of his bulky clothing.
The airport authorities discovered he was carrying 7,000 dollars in cash, cell phones and then opened his luggage, ABC News said.
However, no explosives were discovered.