Dutch police arrest two men on arrival at Schiphol airport...

Not that much information is out yet...

Dutch airport police have confirmed that two men have been arrested in Amsterdam after their arrival from Chicago, as American media said the men had been charged with "preparation of a terrorist attack."

"Two men were arrested at the request of the judicial police" Monday morning at Amsterdam's Schiphol airport, Robert van Kapel, spokesman for the airport police, told AFP early Tuesday.

"The two were arrested on board a plane from Chicago," he added but said he was unable to give any more details because an inquiry was underway. The Dutch prosecution service could not be reached for comment.

America's ABC News identified the men as Ahmed Mohamed Nasser al-Soofi and Hezam al-Murisi, and said Soofi was from Yemen, citing one of the man's neighbors.

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.