The 20 masked men who stormed into the Sadat metro station early Wednesday damaged windows and doors of a metro train and caused a delay in metro traffic, the Egyptian Ministry of Transport said in a statement. Cairo Metro is now operating normally, the statement said. Security personnel and administrative officials at the station negotiated with the masked youths to deter them from blocking the metro, the statement said. On Sunday, fifteen masked men broke into Cairo Metro Sadat Station and called for closing the station and halting metro operations within the framework of a civil disobedience in protest of the recent constitutional declaration and the draft constitution. Cairo Metro Chairman Abdallah Saleh and transport police chief Major General Wagih Sadeq negotiated with the masked men to give up their demand in order not to harm people\'s interests. Sadat station is a vital metro station because commuters can change their destination only in the stations of Sadat and Martyrs of the 25th January Revolution. Cairo Metro is a transport artery in Cairo carrying about 3 million commuters daily, thus bringing the underground to a standstill paralyizes Cairo traffic.