He was the chief of the hardline political party Jamiat Ulema-i-Islam-Sami.
The madrassa in Akora Khattak in Nowshera district of the province is known for having several top Afghan Taliban leaders among its alumni, including former Taliban chief Mullah Omar who received an honorary doctorate from the seminary.
Specially designated global terrorist Sirajuddin Haqqani, who carries a reward of $10 million US bounty on his head, is the acting interior minister while his uncle -- Khalil Haqqani -- has been named as acting minister for refugees.
'Against the backdrop of difficult administrative, political and economic problems, Imran's temperament and staying power will be the subject of intense expectation and public scrutiny,' says Rana Banerji, who headed the Pakistan Desk at the Research and Analysis Wing, India's external intelligence agency.