(ANSA) - Perugia, July 30 - Italy has expelled the former imam of a mosque in suburban Perugia, following his release from prison where he served a six-year sentence for terrorist training. Moroccan Mostapha El Korchi, former imam of the mosque at Ponte Felcino, was released and repatriated from Rome's main Leonardo da Vinci airport. He was regarded as a central character in an investigation that led counter-terrorism authorities in Italy to arrest him and two Moroccan assistants, and seize a wide range of materials. El Korchi had been under surveillance for months with police tracking his Internet activity and recording public sermons in favour of jihad or holy war, police said at the time of his arrest. El Korchi, who was active in training would-be terrorists, served his sentence in a prison in southern Italy and was then immediately expelled as ordered by the courts in his sentence.