Manama Bahrain .Troops and tanks sealed off the capital of this tiny Gulf kingdom after riot police swinging clubs and tear gas against protesters broke, many of them sleeping in an assault before dawn on Thursday that uprooted their protest camp demands for political change. Medics said four people died. Hours after the attack on Pearl Manama's main square, the Army announced a ban on demonstrations, telling state television that was "essential elements" of capital under control. After several days of detention, the leaders of the island nation of repression unleashed a strong Sunni, trying to eliminate the confusion first against the government for the Arab States of the Gulf since the uprising in Tunisia and Egypt. In the surprise attack, the police demolished the tents of the demonstrators, beating men and women inside and cleaning spray of shotgun pellets.