A Moroccan national was detained without bail in Connecticut after FBI agents discovered his plot to fly bombs on drone-like devices made out of radio-controlled airplanes into a school and a federal building, according to federal authorities.

The FBI arrested 27-year-old El Mehdi Semlali Fahti on Monday on immigration-related charges, and he may later face terrorism charges in a federal grand jury investigation, federal prosecutors said. Fahti’s arrest was first reported by the Connecticut Post .