PARIS -- French judicial authorities Saturday began a criminal probe of a third man in an investigation of a suspected network that sent Islamic combatants to Iraq, officials said. Cherif Kouachi was placed under investigation for "criminal association with a terrorist enterprise," judicial officials said. Kouachi, 23, is suspected of volunteering to travel to Iraq to fight against U.S.-led coalition forces. A day earlier, two others -- suspected recruiter Farid Benyettoun, 23, and Thamer Bouchnak, 22, a suspected volunteer fighter -- were also placed under investigation and detained.