NEW : US congratulates Iraqis , mourns loss of life , praises overall security measures . Speaking at the White House , President Obama also downplayed Sunday 's violence . Polls close in Iraq ; results expected by Wednesday , U.N. Mr . ` ` It 's an election we ca n't miss , '' one Iraqi voter says . Militants carry out attacks as they head to polls ; one killed .
NEW : US congratulates Iraqis , mourns loss of life , praises overall security measures . Polls close in Iraq ; results expected by Wednesday , U.N. Mr . ` ` It 's an election we ca n't miss , '' one Iraqi voter says . Militants carry out attacks as they head to polls ; one killed .