Pakistani workers unload boxes of electoral materials for the forthcoming parliamentary elections in central Pakistan's Multan on May 4, 2013. Pakistani Army has been deployed in nine out of 30 districts in sparsely populated Balochistan province. Violence has escalated as the country moves closer to historic elections, which are scheduled on May 11. (Xinhua/Stringer)

Pakistani workers unload boxes of electoral materials for the forthcoming parliamentary elections in central Pakistan's Multan on May 4, 2013. Pakistani Army has been deployed in nine out of 30 districts in sparsely populated Balochistan province. Violence has escalated as the country moves closer to historic elections, which are scheduled on May 11. (Xinhua/Stringer)

Supporters of Pakistan Muslim league Functional (PML-F) march on camel and car as part of an election campaign in southern Pakistani port city of Karachi on May 4, 2013. Pakistan is scheduled to hold parliamentary elections on May 11. (Xinhua/Arshad)

Supporters of Pakistan Muslim league Functional (PML-F) march on a car as part of an election campaign in southern Pakistani port city of Karachi on May 4, 2013. Pakistan is scheduled to hold parliamentary elections on May 11. (Xinhua/Arshad)

Pakistan's former cricket star-turned-politician Imran Khan (C) arrives during an election campaign rally in Charsadda, Pakistan, on May 4, 2013. Pakistan is scheduled to hold parliamentary elections on May 11. (Xinhua/Umar Qayyum)

Pakistan's former cricket star-turned-politician Imran Khan (R) speaks during an election campaign rally in Charsadda, Pakistan, on May 4, 2013. Pakistan is scheduled to hold parliamentary elections on May 11. (Xinhua/Umar Qayyum)

Pakistan's former cricket star-turned-politician Imran Khan (C) leaves during an election campaign rally in Charsadda, Pakistan, on May 4, 2013. Pakistan is scheduled to hold parliamentary elections on May 11. (Xinhua/Umar Qayyum)