He is supposed to appear before the combined investigations team at NAB complex, Thokar Niaz Baig.
There's never been transparent accountability in Pakistan: Saad Rafique
Earlier, he was called in on March 22, but Rafique sent his counsel to seek a later appearance date.
The railway minister is reportedly the owner of Paragon Housing Society. However, he has denied this before the Supreme Court.
A NAB investigation officer told The Express Tribune that the investigations into the Ashiyana-e-Iqbal Housing Scam had led them to Paragon Housing Society as well.
He said that as part of the investigations, NAB raided the offices of Paragon a few weeks back and confiscated documents as part of the investigation into the Ashiyana-e-Iqbal Housing project.
NAB said that they had previously asked for submission of the documents, but they were not provided. Officials said they also found over Rs30 million which was transferred into the account of Paragon Housing Society.
Pakistan Railways retrieves 1,184 acres encroached land
The investigation officer said that the amount was used for the purchase of 32 kanals by Ahad Khan Cheema and his relatives.
Last month, the bureau had also arrested former Lahore Development Authority director general Ahad Khan Cheema and six other accused persons.
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