One major demonstration took place in the Shi'a island of Sitra, where several thousand men, women, and children took to the streets. According to witnesses interviewed by Physicians for Human Rights, hundreds of fully armed riot police arrived on the scene and immediately began firing tear gas and sound grenades into the crowds to cause panic. They then fired rubber bullets into the unarmed crowd, aiming at people in the front line who had sat down on the street in protest.[4]