The CBI filed a supplementary chargesheet on Monday in the multi-million dollar PNB scam, naming Nirav Modi's sister, Purvi Mehta, a Belgian citizen, as an accused. Mehta is allegedly one of the beneficiaries of the funds received through Letters of Undertaking (LOUs) obtained from PNB. Firestar Group of Companies' official Aditya Nanavati has also been named in the chargesheet.