Story highlights It's the first arrest of a law enforcement official for aiding ISIS

There was no danger to the DC Metro system, officials said

Washington (CNN) In the first case of a US police officer charged with aiding ISIS, a Washington Metropolitan Area Transit Authority cop was arrested Wednesday for providing material support to ISIS, the Justice Department announced.

Nicholas Young was arrested by the FBI on Wednesday but was on law enforcement's radar since 2010, according to an affidavit released with Young's arrest.

There was no evidence of any threat to the DC Metro system. Young will make his first appearance in court later Wednesday, according to two law enforcement officials.

He would be the first police officer in the United States arrested and charged with supporting ISIS.

Young has been in contact with undercover law enforcement officers and informants since 2011 and was interviewed as early as 2010 about his relationship with a friend, Zachary Chesser, who pleaded guilty to supporting a foreign terrorist organization, according to court documents.

Read More