MULTAN    -    Vice Chairman Pakistan Tehreek e Insaf Shah Mahmood Qureshi said on Sunday those who are responsible for the missing of the cipher must be investigat­ed. Addressing a press con­ference here, Shah Mahmood Qureshi stated that PTI did not take any illegal step which could harm national interest. He observed that an effort was being made to create division in PTI. Different perks are be­ing given to parliamentarians of Pakistan Tehreek Insaf.