A two-judge division bench comprising Justice Miangul Hassan Aurangzeb and Justice Mohsin Akhtar Kyani issued a notice to the National Accountability Bureau (NAB) to submit a response on appeals filed by the Sharif family.
In their appeals, the three have highlighted alleged flaws in the accountability court's July 6 verdict and asked for the judgement to be declared null and void.
The court adjourned the hearings till the last week of July, which means the three will not be let out before the general elections on July 25.
The court sentenced Nawaz Sharif to 10 years in prison and imposed a fine of 8 million pounds.
The Islamabad High Court has now summoned a NAB prosecutor and investigation officer on the next hearing to record their arguments on the Sharif family's appeals seeking bail and suspension of the accountability court verdict. Scores of supporters and leaders of the ex-premier have turned up in the court to observe the hearing into the appeals.
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Khawaja Harris, legal counsel of Nawaz Sharif, argued that it was a case of having assets beyond known sources of income but the NAB prosecutor and investigator failed to provide valuation of the Avenfield properties during the trial. Maryam Nawaz's husband was arrested later. Maryam and Safdar's counsel Amjad Pervaiz also filed the appeals on behalf of them, Geo TV reported.
On Friday, Pakistan's Ministry of Law and Justice in a notification said that the legal proceedings of the remaining two National Accountability Bureau (NAB) reference cases (Flagship Investment and Al-Azizia) against Sharif and his family will take place in Adiala Jail in Rawalpindi.
Junaid Safdar reached Lahore on Monday to meet his parents and maternal grandfather Nawaz Sharif in Adiala Jail. She has reportedly been on life support since June 14.
Shahbaz Sharif, who now heads the Pakistan Muslim League party, claimed on Wednesday that his brother was forced to sleep on floor of his cell his first night in jail. "Nawaz Sharif, a heart and diabetic patient, needs timely medicine and frequent visits to a doctor".