New Delhi-Vipul Ambani and four other senior executives of Nirav Modi and Mehul Choksi’s companies has been arrested by CBI in 11,400 crore rupees PNB fraud case.CBI had questioned Vipul Ambani who is the chief financial officer of Nirav Modi’s Firestar International.The other arrested persons are Kavita Mankikar who is the authorised signatory of three accused persons, senior executive of firestar Arjun Patil, CFO of Nakshatra and Gitanjali group Kapil Khandelwal and Manager of Gitanjali group Niten Shahi.