CHICAGO - A suburban Chicago teen has been charged with trying to travel overseas to join the Islamic State of Iraq and Syria.

Federal prosecutors said Monday that FBI agents arrested 19-year-old Mohammed Hamzah Khan, of Bolingbrook, on Saturday evening at O'Hare International Airport. They accuse him of attempting to travel overseas to support terrorism.

Mohammed Hamzah Khan Facebook via CBS Chicago

Khan is charged with attempting to provide material support to a foreign terrorist organization. The charge carries a maximum penalty of 15 years and a maximum fine of $250,000. Khan could end up under supervision for life.

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The slight, bearded Khan appeared in a federal court Monday morning in orange jail clothes. He could be seen speaking with his attorney before his hearing started. He left the courtroom in handcuffs. His father waved at him, reports CBS News' Adrianna Diaz. Khan nodded to acknowledge the wave.

Mohammed Hamzah Khan appeared in federal court in Chicago on Monday, two days after he was arrested at O'Hare Airport, trying to travel to the Middle East to join the terrorist group ISIS. CBS News

Khan's U.S. passport was issued on May 2 of this year, reports CBS Chicago.

The federal complaint alleges Khan was trying to travel to Vienna and then to Turkey.

The judge ordered that Khan be held at least until his detention hearing Oct. 9.

After arresting Khan, agents searched his home, and the complaint states they found handwrittern documents there that appeared to be drafted by Khan expressing support for ISIS.

They also found a letter Khan had left for his parents explaining that now that ISIS has established a self-proclaimed caliphate, there is an obligation to migrate to their territory. The letter said that he is upset with the immoral decline of Western societies and invited his family to join him. He urged them not to tell authorities about his journey.

The notebook indicated Khan wanted to travel to the Syrian border.

"We are the lions of War," Khan wrote. "My nation, the dawn has emerged."

The notebook also had a drawing of the ISIS flag.