NEW : Pilgrims are also targeted in the Shiite heartland . Three bombs explode in Sadr City . The bombs exploded in two busy squares that were about 150 meters ( nearly 500 feet ) apart . Two more explode in northern Baghdad Shiite area . One bomb explodes at a checkpoint, killing two soldiers and wounding three others.
NEW : Pilgrims are also targeted in the Shiite heartland . Three bombs explode in Sadr City . Two more explode in northern Baghdad Shiite area . One bomb explodes at a checkpoint, killing two soldiers and wounding three others.