Their further destination, whether they will be taken to Islamabad or Lahore in Pakistan, is not known yet.
"I am leaving behind my ailing wife to come back for the sake of the country", said Nawaz, adding that Kulsoom had briefly opened her eyes but "she did not recognize me". "I know I have been sentenced for 10 years and that I will be taken straight to prison", he said while sitting in the airplane. "Let's build destiny of Pak together".
Pakistani police detained hundreds of members of the former ruling party in the central city of Lahore on Thursday, weeks before the country heads to the polls, party officials said.
Nawaz Sharif and Maryam Nawaz arrived in London prior to Eid-ul-Fitr and are now there due to Kulsoom Nawaz's prolonged illness.
NAB sources in Islamabad said that both the convicted would be kept at Adiala jail for a day before being transferred to the notorious Attock Fort prison.
Thousands of supporters are expected to congregate at the Lahore airport for the dramatic home-coming for Nawaz Sharif, a three-time prime minister who wants to campaign for his party ahead of the July 25 general elections.
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Sharif was last week sentenced in absentia to 10 years by an anti-corruption court for failing to declare how he bought Park Lane flats in London.
Flights that were to arrive at Islamabad airport this morning have been diverted to Lahore airport. The former prime minister and his daughter were in London, where Sharif's wife Begum Kulsoom is undergoing treatment for cancer.
Hussain Nawaz was talking to media about her mother's current condition, he said, "After exactly one month, she [my mother] has opened her eyes". I don't have anything else to share. "I only request that please remember her in your prayers". "Told my kids to be fearless in the face of oppression". But kids will still be kids.
NAB Rawalpindi has asked for and got ten woman police personnel from Pakistan's Punjab province, but sources told The News that it is still highly unlikely Maryam would be lodged at NAB's police station at the Rawalpindi bureau, where her father will most likely be taken.
Sharif, who was disqualified by the Supreme Court past year in the Panama Papers case, is now the supremo of the PML-N.