Inmates of the Central Prison in the northern Yemeni province of Hajjah continued their sit-in demonstration for the second day in protest over the delaying of their cases by courts and prosecutions. Police attempted to disperse the crowd with tear gas and firing live shots in the sky, leaving at least 40 prisoners wounded, 7 of whom are in critical conditions.The injured inmates were rushed to the Saudi Hospital for treatment, local security source was quoted as saying. The prisoners started their sit-in rally yesterday demanding that the authorities revamp the bad services and conditions of the prison, and that the prosecutions and courts stop neglecting their cases. The protesters also complain of bad health conditions that prompted infectious diseases to spread among them.The Riots police was called in to deal with the protesters. They used more than 25 tear gas bombs in a bid to disperse the prisoners after the provincial security chief, and the head of Hajjah prosecution failed to convince the them to stop their protests, the paper said, citing sources from the prison.Yesterday afternoon, one of the protesting prisoners attacked the jail director, Yahia al-Mualmi, by stabbing him right in the neck with a sharp dagger. However, al-Maualmi injury was described as light and his health condition as stable by doctors.We have been attacked in the presence of the provincial security chief and the provincial prosecutor as we refused to listen to them and stop our protests, a prisoner was quoted saying.The police presence was at least doubled in and around the prison and strict security measures were taken to foil any potential collective escape of prisoners after the riots today.