Unauthorised bank transaction

Dear members,

I need appropriate guidance on this issue:

I have not operated one of my bank account ; it is a overdraft against fixed deposits;

on nov 2013 , an unauthorised transactions of 121,000 has been transfered from my account on basis of email the bank has transfered the money.

It came to my knowledge last week and bank has closed my fixed deposit and adjusted the same for the original amount and intrest of the same.

what are options and how I have to proceed.

jegannathan