NEW : U.N. secretary - general is ` ` extremely concerned '' about ongoing unrest . Police used tear gas on demonstrators Monday in Cairo . Speaking in Abu Dhabi , Ban told reporters the new government should protect human rights and guarantee freedom of speech and association . Prime Minister Mohamed Ali announces a new government . Weeks of demonstrations have left 78 dead and has cost billions , the government says .
NEW : U.N. secretary - general is ` ` extremely concerned '' about ongoing unrest . Police used tear gas on demonstrators Monday in Cairo . Prime Minister Mohamed Ali announces a new government . Weeks of demonstrations have left 78 dead and has cost billions , the government says .