As campaigning intensifies, attacks in different areas of the country have stoked fear of more violence in the Muslim country of 208 million where political rallies can draw tens of thousands of people.
The July 25 election features dozens of parties, with two main contenders: ex-cricket hero Imran Khan's Pakistan Tehree-i-Insaf and the Pakistan Muslim League-Nawaz, which vows to win a second term despite the jailing of founder, ex-Prime Minster Nawaz Sharif, on a corruption conviction.
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