BAGHDAD - Twenty people were killed on Monday as suicide bombers attacked Iraqi police and soldiers casting their vote early for a national election in two days' time, authorities and witnesses said.
Sunni Muslim militants, mostly disguised in army and police uniforms, struck at polling centers around Baghdad and northern Iraq as militants tried to disrupt Iraq's fourth national election since the fall of Saddam Hussein in 2003.
A curfew begins on Tuesday night as ordinary Iraqis prepare to vote on Wednesday. Security forces are at war with the al-Qaida offshoot the Islamic State of Iraq and the Levant in western Anbar province and other areas encircling the capital.
Prime Minister Nuri al-Maliki is battling for a third term in office but faces fierce opposition from political opponents, with sectarian violence in the Shi'ite Muslim-majority country at its most intense since 2008.
In the western Mansour district of Baghdad, six police died and 16 others were wounded when a suicide bomber dressed as a policeman detonated his explosives at the entrance of a school being used for voting, police and medical sources said.