The attack in the northwestern province of Khyber Pakhtunkhwa follows a series of bombings at political rallies before the election, the most devastating of which was a suicide attack this month that killed 149 people in the southwestern province of Balochistan.
A Pakistani election candidate was killed in a suicide blast in Khyber-Pakhtunkhwa province on Sunday, the Dawn reported, quoting the police.
He "succumbed to his injuries in Combined Military Hospital after a suicide bomber blew himself up near his Land Cruiser (SUV) this morning", district police chief Zaheer Afridi told AFP.
Afridi also confirmed that the bombing, which took place in Kulachi area, was a suicide attack.
Khan is hoping to achieve a years-long dream of becoming prime minister, with recent polls showing his Pakistan Tehreek-i-Insaf (PTI) party climbing nationally ahead of Wednesday's vote.
Pakistan Tehreek-i-Insaf chief Imran Khan has condemned the attack.
Chemist shops in Rawalpindi’s Bohr Bazaar remain closed in protest against Hanif Abbasi’s life sentence. — White Star
In another political attack Sunday in the northwestern town of Bannu, unknown assailants fired at a vehicle carrying Akram Khan Durrani, leader of the Jamiat-Ulema-Islam-Fazl party that supports the Afghan Taliban.
Earlier this month, another provincial assembly candidate was killed in one of the worst terrorist attacks Pakistan has ever suffered.
Two policemen who were with Gandapur were among the injured.
Pakistan's elections have been fraught with tension since former prime minister Nawaz Sharif was found guilty on charges that he and his family hid unreported income in luxury apartments in London and other offshore properties - a case Sharif's supporters allege was orchestrated by the country's military to oust the prime minister.
He lamented the decision against Hanif Abbasi, saying the verdict was given around 12 am, while he added that the Election Commission of Pakistan made the right move by postponing the polls in the constituency.
Commenting on the massive protests outside general headquarters, Baloch National Movement president said that the public is chanting slogans against ISI openly on the streets of Pakistan. The deadly suicide blast claimed the lives of almost 150 people.
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