Pakistan Tehreek-e-Insaf (PTI) founder Imran Khan has been grilled over his instigation on social media, 24NewsHD TV reported on Saturday.
An FIA cybercrime team visited Khan and conducted a 45-minute interrogation, asking detailed questions about the nature of the post.
The three-member team, led by Deputy Director Ayaz Khan focused on the contents of the threatening message.
The investigation took place after the PTI founder insisted on being questioned in the presence of his legal team, which was granted.