Minister for Energy Engineer Khurram Dastagir Khan on Friday said that last regime of Pakistan Tehreek e Insaf , had used the National Accountability Bureau , for personal benefits.Amendment in NAB laws was imperative but PTI could not pay attention to bring improvement for this institution, he said while talking to a private television channel. To a question about the amendment in NAB laws, he said, we will see the bill regarding NAB in the assembly. —INP