An election candidate and his driver were killed by a suicide bomb attack in northwest Pakistan on Sunday, police said, three days before the country's general election.
Khan himself has been accused of being linked to the country's powerful military.
Former Pakistan captain Mohammad Hafeez refrained from showing his political affiliation, instead he chose to use the medium to urge people to come out and vote on 25 July.
Cricketer-turned-politician Imran Khan, who looks to emerge victorious after when the results are announced as per the Pakistan media reports, is finding support from his former teammates who have thrown their weight behind the PTI leader.
The attack followed a suicide blast in the southwestern province of Balochistan on July 13 which killed 149 people, underscoring continuing security challenges in Pakistan following years of dramatic improvements.
The enormous mobilisation will include troops placed inside and outside polling stations.
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Modi in his speech accused Gandhi of "trampling upon the truth to mislead the nation on security-related issues". He compared the status of employment with China which gives jobs to 50,000 people in 24 hours.
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Army chief General Qamar Bajwa, however, assured that military personnel deployed for election duties would strictly comply with the code of conduct given by the ECP.
While both the leaders are clear about their choice in the upcoming election, the Rawalpindi express, Shoaib Akhtar didn't show the same enthusiasm. Whereas, they must present it to election authorities and other security authorities when asked. The voting will start at 8.00 am and will continue till 6.00 pm.
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Gandapur's Pakistan Justice Party is headed by former cricket star Imran Khan, who is considered a strong contender to become prime minister.
Political analyst Dr Syed Farooq Hasnat said that this year's elections are going to be one of the most interesting ones in the country's history.
The prime minister-designate of Pakistan's Muslim League party pledges to emulate Mahathir in developing Pakistan.