El Sayed Ahmed Elsayed Ibrahim, 20, and Alaa Abd El Fattah Ali El Bahnasawi, 20, were arrested at a residence in Dundalk, Md., outside Baltimore, by U.S. Immigration and Customs Enforcement agents.
Chicago police detained Ahmed Mohamed Mohamed Abou El Ela, 22, at OHare International Airport as he was attempting to book a flight to Montana, the FBI said. Immigration agents later took El Ela into custody.