Out of 34 bulletproof vehicles imported from Germany, 20 were allegedly added to Nawaz Sharif's own convoy and were also used by his daughter Maryam.
Maryam criticised the ruling Pakistan Tehreek-e-Insaf (PTI) government for mistreatment of the three-time elected premier, following her visit to the jail to meet her father, Dawn newspaper reported.
According to a medical test conducted last week, 69-year-old Sharif is suffering from hypertension, diabetes and Ischemic heart disease.
The Assets Recovery Unit was referring a case of the new London property belonging to the Sharif family to the National Accountability Bureau (NAB) for investigation.
The Sharifs had been sent to the jail two months ago in the corruption case related to their purchase of four luxury flats in Avenfield House in London.
Nawaz Sharif, his daughter and son-in-law granted parole, reached Lahore to attend Kulsoom's funeral
The duration of permission granted for the parole shall not exceed 12 hours. Police will be responsible for their security and safety.
The three will be granted parole from the time of Kulsoom's funeral prayers till her burial, Geo TV reported, citing the Interior Ministry sources.
The father-daughter duo are currently serving their term at Adiala Jail in Rawalpindi, along with Maryam's husband Captain (retd) Safdar who was sentenced to a year in prison.
In an emotional audio message recorded before going to jail, Maryam appealed to the nation to pray for her mother's health.
Sharif, 68, and Maryam, 44, were taken into custody in the Avenfield corruption case, shortly after their arrival at Lahore airport from London last night.
Both Sharif and Maryam have been sentenced by an accountability court for 10 and 7 years in prison respectively.
The protesters pelted police and rangers with stones when they fired tear gas on them.
Sharif, along with Maryam, was arrested as they returned to eastern city of Lahore from London to serve a 10-year and seven-year jail term, respectively, on corruption charges, officials said.
Pakistan's ousted prime minister Nawaz Sharif was today arrested after being sentenced to 10 years in prison last week in one of the three corruption cases.
Former Pakistan Prime Minister Nawaz Sharif and his daughter Maryam, who were sentenced for long jail terms in a graft case, were arrested upon their arrival the Allama Iqbal International Airport.