Pakistan Tehreek-e-Insaf leader and former federal minister Asad Umar was arrested in Islamabad in a cipher case on Sunday.
Yesterday, former foreign minister Shah Mehmood Qureshi was also arrested in Islamabad.
Meanwhile, a sessions court in Islamabad granted the Federal Investigation Agency (FIA) a day's remand for Shah Mahmood Qureshi.
Judicial Magistrate Ehtisham Alam Khan issued the orders, asking the body to produce him before the court on Monday.
Qureshi, who served as foreign minister under ex-prime minister Imran Khan and is the vice chairman of the PTI, was arrested in the capital Islamabad on Saturday evening.
Speaking with media persons before being sent on remand, Qureshi said no secret code of Pakistan has been compromised. He spoke about proving his responsibility and having "acted responsibly".
"I have not shared any such document with any unrelated person," he said, further insisting on always protecting Pakistan's interests and never compromising on them.
The politician denied being part of any conspiracy or possessing any such intentions. "This is a politically motivated case."
Qureshi reiterated that his conscience is clear and he has always done the right thing.