(see related) (ANSA) - Genoa, December 18 - Authorities at Genoa's Marassi penitentiary on Wednesday said they had no clue escaped prisoner Bartolomeo Gagliano was a convicted serial killer when they allowed his temporary release. "The paperwork says he's a robber,'' prison warden Salvatore Mazzeo told reporters. Gagliano, 55, has been convicted of the murders of two prostitutes and a man, plus an attempted murder between 1981 and 1989. He has also been convicted for robbery, drugs and weapons possession, aggression and extortion. He was granted a temporary-leave permit to visit his mother in Savona as a reward for good conduct over the past three years when he hijacked a civilian car at gunpoint and went on the lam on Wednesday. Gagliano had already escaped from a criminal psychiatric hospital in Montelupo Fiorentino near Florence in 1989.