Two suburban Chicago men accused of trying to provide material support to terrorists and who posed for photos holding an Islamic State group flag have pleaded not guilty to federal terrorism charges.

A complaint unsealed after their April arrests in an FBI sting says that Joseph Jones and Edward Schimenti agreed to provide cellphones that could be used as car-bomb detonators in Syria. They also posed for photos holding a black ISIS flag at Illinois Beach State Park.

 The 35-year-olds from Zion face 20-year maximum prison terms if convicted.