The CBI has arrested Vipul Ambani, Mukesh Ambani's cousin and President (Finance) of Nirav Modi's Firestar Diamond firm in connection with $1.77-billion PNB scam. Firestar's executive assistant Kavita Mankikar and Senior Executive Arjun Patil were also arrested. They were reportedly responsible for getting the Letters of Undertaking worth ₹6,498 crore issued illegally with help of PNB officials.