Imran Khan heads for victory in Pakistan Ex-cricket star Imran Khan is on track to become prime minister after an election marred by accusations of vote rigging Imran Khan Leader of PTI party, will need to form coalition if he is unable to secure simple majority of 137 seats Shehbaz Sharif Head of PML-N and brother of jailed former Prime Minister Nawaz Sharif, vowing to challenge results Bilawal Bhutto Zardari Leader of historically liberal PPP. Son of assassinated former Prime Minister Benazir Bhutto ELECTION RESULTS (47% of polling stations counted) Imran Khan 114 Pakistan Tehreek-i-Insaf (PTI) Shehbaz Sharif 64 Pakistan Muslim League-Nawaz (PML-N) Bilawal Bhutto 42 Pakistan Peoples Party (PPP) Majority: 137 seats 272 National Assembly constituencies contested Turnout estimated at 50-55% of 106 million registered voters 0 30 60 90 120 Sources: Election Commission of Pakistan, Dawn Newspaper Pictures: Getty Images © GRAPHIC NEWS