NEW : Syrians opposition say they have formed breakaway government council . NEW : Many details have yet to emerge on the new CNN . NEW : Activists say 188 people die in clashes and random gunfire on Friday . Syrian ambassador summoned over attack against Istanbul ambassador , an official says .
NEW : Syrian opposition say they have formed breakaway government council . NEW : Many details have yet to emerge on the new Syrian National Council . NEW : Activists say eight people die in clashes and random gunfire on Saturday . Syrian ambassador summoned over attack against U.S. ambassador , an official says .