Leader of Egypt's Ghad el-Thawra Party Ayman Nour has condemned arsonists who torched the party's Cairo head office on Friday evening. Witnesses said that four masked men and a woman forced party employees to leave the headquarters, before setting the building on fire. They added that documents, videotapes and computers were also stolen from the scene. After assessing the damage, Nour told Arabstoday that the "criminals involved in this incident are the same people who are spreading chaos in the country." A party worker revealed that suspects wrote the words "Black Bloc" on the walls of the building. He added that workers were shocked by the incident and want and called on both security forces and Ayman Nour to track down the arsonists.