A man in Colorado was arrested on Monday after he allegedly made plans to fly overseas and fight for the ISIS terrorist group.

The Department of Justice said in a press release that Humzah Mashkoor, 18, was arrested at the Denver International Airport before he was able to board a flight for the first leg of an international trip.

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Mashkoor was planning to fly to the United Arab Emirates, according to officials, and intended to stay there until he could go to Afghanistan or Syria to "serve as a fighter for ISIS."

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Mashkoor, from Westminster, Colorado, was charged with attempting to provide material support to a designated foreign terrorist organization.

The 18-year-old made his first court appearance on Monday. 

The FBI Denver Field Office is investigating.