Iraqi officials said suicide bombers have targeted polling centers as soldiers and security forces cast ballots ahead of parliamentary elections, killing at least nine people, AP reported. Police say in one of the attacks on Monday, in the northern city of Tuz Khormato, the bomber blew himself up at a checkpoint leading to the polling center. Major General Torhan Abdulrahman Youssef says six security personnel were killed and four were wounded. Interior Ministry spokesman Saad Maan Ibrahim says another bomber struck a polling center in Baghdad's western Mansour area, killing three troops and wounding four. A police officer says five security forces were wounded in another suicide attack, in the northern city of Mosul.