Young politico says he disappeared following orders of father Shah Mehmood Qureshi — PTI's incarcerated leader
Mobile phone services suspended in cities; thousands of security personnel deployed
PTI-SIC leader Barrister Taimur Altaf Malik and PPP's Ali Qasim Gillani leading candidates contesting for seat
Children aged 12 to 15 years are also among the dead, says district administration
