A National Guard soldier and his cousin have been arrested in Illinois for attempting to join the Islamic State of Iraq and greater Syria (ISIS), the Department of Justice announced Thursday.
Hasan Edmonds, a 22-year-old member of the Army National Guard, had planned to travel to Egypt and team up with the Islamist militant group, according to a criminal complaint filed on Wednesday. Hasan’s cousin Jonas Edmonds, 29, is accused of intending to use information provided by his cousin to carry out an attack on the U.S. military facility in Illinois where Hasan had been training. The FBI said it learned of the plan when Jonas asked an uncover agent to help carry out the attack. Jonas allegedly told the agent he would provide uniforms and information about the base.
Hasan was arrested at Chicago Midway International Airport Wednesday evening where the FBI said he planned to begin the first leg his journey. Jonas Edmonds was arrested at his home in Aurora, Ill.
“We will pursue and prosecute with vigor those who support ISIL and its agenda of ruthless violence,” said U.S. Attorney Zachary T. Fardon in a press release, using an alternate abbreviation for ISIS. “Anyone who threatens to harm our citizens and allies, whether abroad or here at home, will face the full force of justice.”
The cousins had described their plans to an undercover FBI officer, the complaint says. Both were charged with conspiracy to provide support and resources to a foreign terrorist organization.
Read more: U.S. Intel Chief: Roughly 40 Americans Have Returned From Syria
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Write to Justin Worland at justin.worland@time.com