Supporters of the Pakistan Muslim League-Nawaz (PML-N) party react as leaders speak during a campaign rally in Lahore May 9, 2013. Pakistan will hold general elections on May 11. REUTERS/Damir Sagolj (PAKISTAN - Tags: POLITICS ELECTIONS)

An election worker looks from inside a bus as ballot boxes and polling booths are transported from a compound used as a storage area for election material in Lahore May 10, 2013. Pakistan's general elections will be held on May 11. REUTERS/Damir Sagolj (PAKISTAN - Tags: SOCIETY ELECTIONS POLITICS)

An election official marks a voter's thumb with ink for identification as she gets a ballot paper before casting her vote at a polling station in Peshawar May 11, 2013. A string of militant attacks cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy.
REUTERS/Faisal Mahmood (PAKISTAN - Tags: POLITICS ELECTIONS)

A voter stamps a ballot paper before casting her vote in the general election at a polling booth inside a polling station in Lahore May 11, 2013. A string of militant attacks cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy. The words on the placard (R) read in Urdu "Location for stamping ballot papers". REUTERS/Mohsin Raza (PAKISTAN - Tags: POLITICS ELECTIONS)

Election officials discuss after a polling station was opened in a village near Lahore May 11, 2013. A string of militant attacks cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy. REUTERS/Damir Sagolj (PAKISTAN - Tags: SOCIETY ELECTIONS POLITICS TPX IMAGES OF THE DAY)

A voter arrives to a polling station just before it closed in Lahore May 11, 2013. A string of militant attacks and gunfights that killed at least 17 people cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy. REUTERS/Damir Sagolj (PAKISTAN - Tags: ELECTIONS POLITICS)

Women register and cast their ballots at a polling station in the old part of Lahore May 11, 2013. A string of militant attacks cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy. REUTERS/Damir Sagolj (PAKISTAN - Tags: POLITICS ELECTIONS SOCIETY)

Women vote at a polling station in a village near Lahore May 11, 2013. A string of militant attacks cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy. REUTERS/Damir Sagolj (PAKISTAN - Tags: SOCIETY ELECTIONS POLITICS)

Women wait to vote at a polling station in a village near Lahore May 11, 2013. A string of militant attacks cast a long shadow over Pakistan's general election on Saturday, but millions still turned out to vote in a landmark test of the troubled country's democracy. REUTERS/Damir Sagolj (PAKISTAN - Tags: SOCIETY ELECTIONS POLITICS)

A supporter of Imran Khan, Pakistani cricketer-turned-politician and chairman of political party Pakistan Tehreek-e-Insaf (PTI), lays flowers outside Shaukat Khanum Cancer Hospital to pray for his quick recovery in Lahore May 8, 2013. Khan injured his head after falling off a mechanical lift raising him onto a stage at a rally on Tuesday four days before national elections, party and medical officials said. Khan fell as the lift was just short of the 15ft (4.5 metre)-high platform in the eastern city of Lahore, witnesses said. Pakistan's general elections will be held on May 11. REUTERS/Mohsin Raza (PAKISTAN - Tags: POLITICS ELECTIONS HEALTH)

A girl walks in the old part of Lahore decorated with pre-election posters May 10, 2013. Pakistan's general elections will be held on May 11. REUTERS/Damir Sagolj (PAKISTAN - Tags: SOCIETY ELECTIONS POLITICS)