Iraq says it will close its borders and extend curfew hours as part of an extensive security plan for Thursday's parliamentary elections. The Interior Ministry says the curfews will begin Tuesday and last until Saturday. During that time, road travel will be restricted to vehicles with special permits. All airports will be closed from Wednesday to Friday. U.S. ambassador to Iraq Zalmay Khalilzad has expressed hope for high voter turnout from Iraq's Sunni population, which mostly boycotted elections in January. Meanwhile, police say insurgents in Mosul opened fire Sunday on the campaign headquarters of the Turkmen Front, killing two people. Separately, a worker was killed in the city while putting up campaign posters. And al-Arabyia television reported that insurgents claim to have kidnapped four Iranians outside of Baghdad.