( CNN ) -- Passengers flying into the United States from abroad should expect additional security measures at U.S. and international airports after a passenger detonated a device aboard a flight from Amsterdam , Netherlands to Detroit , Michigan , the Transportation Security Administration said Saturday . Measures will include increased pat-downs and gate screening , as well as having to stow carry-ons and personal items , including pillows . `` We ask that passengers follow the instructions of international security and flight crews , '' the TSA said . Security has also been ramped up at U.K. airports and at Schiphol Airport in Amsterdam , where the suspect , Umar Farouk Abdulmutallab , went through `` normal security procedures '' before boarding the flight , according to security officials . Abdulmutallab , 23 , was charged in a federal criminal complaint Saturday with attempting to destroy the plane Friday on its final approach to Detroit Metropolitan Airport , and placing a destructive device on the aircraft , the Department of Justice said . At Schiphol , secondary screenings were boosted Saturday with body searches and bag checks , officials said . As part of the increased security , passengers on a flight Saturday from Brussels , Belgium , to Dulles Airport in Virginia were not allowed to leave their seats for the last hour of the flight , a traveler told CNN . Niki Yazzie said the flight crew told the passengers that they had to remain in their seats with their seatbelts fastened and could n't have any items , such as pillows or blankets , covering their laps ; everything was stowed away . Passenger Johnny McDonald , who was on a U.S. domestic flight , told CNN he saw officials X-ray milk parents had brought for infants and saw many people patted down . `` They X-rayed the milk I do n't know how many times , '' McDonald said . `` And then they took the milk out and sampled each and every bottle of the milk . I 've never seen that before . '' Secondary searches are also being introduced much more widely at airports around the world , CNN 's Richard Quest reported . An official with the TSA told CNN that along with increased security at airports , screening likely will take longer . No details were provided on all the steps being taken . The official advised travelers to allow for extra time before their flights . There will be no changes in screening requirements and no change in the number of carry-on bags allowed . A note was released earlier this week by the Office of Intelligence and Analysis that said FBI officials `` currently have no specific , credible intelligence indicating plans by al Qaeda or other terrorist groups to conduct attacks in the United States during the 2009 holiday season . '' CNN 's Jeanne Meserve and Kate Bolduan contributed to this report .
NEW : Passengers report being confined to seats on aircraft , more patdowns before boarding . `` We ask that passengers follow the instructions of international security and flight crews , '' TSA says . An official with the TSA told CNN that screening likely will take longer . No changes in screening requirements , and no change in the number of carry-on bags allowed .