Nultiple regulators are probing the nexus of scamsters with diamonds after a state-run bank got defrauded of $1.8 billion by designer jeweller Nirav Modi.
The banks also received a warning from the rating agency Care, in February 2016, after Firestar's financials deteriorated.
Despite the rating agency CARE withdrawing the ratings assigned to the bank facilities of FIPL "with immediate effect" following the receipt of a no-objection certificate (NOC) from the banks, Modi's company received uninterrupted letters of undertaking (LoUs) from PNB, which were honoured by other banks until a few weeks ago.
The Income Tax Department on Tuesday also raided 20 premises linked to Gitanjali Gems promoter Mehul Choksi and suspected shell firms in connection with an alleged tax evasion case against them, official sources said.