A 19-year-old man from suburban Chicago pleaded not guilty on Tuesday to federal charges of trying to provide material support to Islamic State militants after he tried to travel with his two younger siblings to the Middle East to join the Islamic State.

Mohammed Hamzah Khan of Bolingbrook, Illinois, was arrested in October at O'Hare International Airport as he tried to board a plane to Vienna en route to Istanbul with his then 17-year-old sister and 16-year-old brother.

After the hearing Khan's mother, Zarine Khan, said her son was recruited over social media. She condemned the radical movement that she said lured her children to save their money to obtain passports in secret and buy tickets to travel halfway around the world.