PML-N Senator Nehal Hashmi resigned from Senate hours after a video surfaced on Wednesday showing him lashing out at "those investigating" Prime Minister Nawaz Sharif's family.

Chief Justice of Pakistan Mian Saqib Nisar also took suo motu notice of Hashmi's remarks and summoned him in person on Thursday to appear before the bench implementing its Panama Papers verdict, media reports said.

In the video, the senator had warned that those conducting the investigation will be "taken to task" for grilling the premier's family.