Former Pakistani premier Nawaz Sharif waves to supporters as he leaves after attending a meeting with traders during election campaign in Islamabad on May 1, 2013. An election candidate escaped unharmed on May 1 in a suicide bombing in southern Pakistan which left two people wounded, police said, after the latest in a wave of attacks to hit the campaign. Violence has spiked in the nuclear-armed country ahead of national elections on May 11, with at least 61 people killed in attacks on politicians and political parties since April 11, 2013. AFP PHOTO / AAMIR QURESHI
British Prime Minister David Cameron and Prime Minister of Pakistan Muhammad Nawaz Sharif hold a meeting in the White Room of Number 10 Downing Street on April 30, 2014 in London, England. During his visit to the UK, Mr Sharif is scheduled to meet with David Cameron, address an Investment Conference and meet members of the Pakistani Diaspora.
British Prime Minister David Cameron (L) greets Prime Minister of Pakistan Muhammad Nawaz Sharif in Downing Street on April 30, 2014 in London, England. During his visit to the UK, Mr Sharif is scheduled to meet with David Cameron, address an Investment Conference and meet members of the Pakistani Diaspora.
Pakistan Prime Minister Nawaz Sharif (L) meets with U.S. President Barack Obama in the Oval Office of the White House October 23, 2013 in Washington, DC. Sharif met with U.S. President Barack Obama for bilaterial meetings.
German Chancellor Angela Merkel and Pakistani Prime Minister Nawaz Sharif listen to their countries' respective national anthems upon Sharif's arrival at the Chancellery on November 11, 2014 in Berlin, Germany. Sharif is on a two-day official visit to Germany.
British Prime Minister David Cameron (L) walks with Pakistani Prime Minister Nawaz Sharif at the Prime Minister's house on June 30, 2013 in Islamabad, Pakistan. Cameron visited Pakistan following his unannounced trip to Afghanistan where he visited troops in Helmand province as the NATO military coalition hands responsibility over to local forces.
Nawaz Sharif, leader of political party Pakistan Muslim League-N (PMLN), addresses supporters during an election campaign rally on May 03, 2013 in Multan, Pakistan. Pakistan's parliamentary elections are due to be held on May 11. Imran Khan of Pakistan Tehrik e Insaf (PTI) and Nawaz Sharif of the Pakistan Muslim League-N (PMLN) have been campaigning hard in the last weeks before polling.
Pakistan's Prime Minister Nawaz Sharif (R) meets with British Foreign Secretary Philip Hammond after the opening session of the UK-Pakistan Energy Dialogue on November 13, 2014 in London, England. They discussed in the meeting how Pakistan can best address its energy challenges by sharing expertise and experience in the energy sector.