Nirav Modi and his uncle Mehul Choksi are the prime accused in the PNB fraud case, related to alleged fraudulent issuance of Letters of Undertaking that caused a loss of over USD 2 billion to the public sector bank.
Nirav Modi was earlier arrested in London in March and his extradition process is pending.
The 48-year-old is currently lodged in Wandsworth Prison in London while his 60-year-old uncle is in Antigua exploring all legal options to evade clutches of Indian investigative agencies.
Modi has claimed he is suffering from anxiety and depression.