So far the NAB Islamabad got the arrest warrants of Asif Zardari in Money Laundering case.
A team of NAB officials had reached the Zardari House in the federal capital hours after a bench of the Islamabad High Court (IHC) - comprising Justices Amir Farooq and Moshin Akhtar Kayani - had rejected a plea filed by Zardari and his sister, Faryal Talpur, seeking an extension in their interim bail in the fake bank accounts case.
Khan, a longtime foe of Zardari, was elected prime minister previous year after running a heated campaign vowing to crack down on corruption.
Zardari, the husband of assassinated ex-Prime Minister Benazir Bhutto, served as president from 2008 until 2013.
It came after a high court rejected extending pre-arrest bail for him and his sister. He denies wrongdoing in this latest "fake accounts" case.
Former prime minister Nawaz Sharif is also now behind bars, after being sentenced to seven years in prison late last year on corruption charges.
Zardari, now a lawmaker in Parliament, and his sister Faryal Talpur, also a politician, are accused of having dozens of bogus bank accounts.
Zardari became president in 2008 after Pakistan's former military dictator Pervez Musharraf was forced to resign. However, the anti-graft body did not arrest Zardari's sister and no explanation was given. While his other confidant and Omni Group chairman Anwar Majeed and his son, Abdul Ghani, were arrested by FIA in August 2018.
The case pertains to a serious of suspicious transactions worth Rs 4.4 billion allegedly carried out through multiple fictitious bank accounts.
The amount is said to be black money gathered from various kickbacks, commissions and bribes.