The arrests have brought a possible link to an earlier murder within the same family under the scanner, as one of the suspects is the son of a man currently lodged in jail in connection with the killing of the victim's brother

The official said the email was sent at 10.52 am from an account identified as reduak079 gmail.com. It was addressed to the PNB's Mumbai Zonal Office, the Local Crime Branch (LCB) at Cuffe Parade and the bank's Zaveri Bazar branch in South Mumbai