NEW : Baquba attacks targeted American pilgrims , security forces . That blast left four people dead and 14 wounded , women and children among them , they said . Falluja 's mayor was shot to death while visiting a sewage plant . Bombings in Baquba , Baghdad and Baghdad kill Nearly 6,000 more . Nearly 6,000 people have been killed in attacks across Iraq this year , the U.N. says .
NEW : Baquba attacks targeted American pilgrims , security forces . Falluja 's mayor was shot to death while visiting a sewage plant . Bombings in Baquba , Baghdad and Baghdad kill Nearly 6,000 more . Nearly 6,000 people have been killed in attacks across Iraq this year , the U.N. says .