If industry sources are to be believed, the box-office success of Hrithik Roshan and Katrina Kaif-starrer 'Bang Bang' last year has spurred the makers to come up with a sequel to the action flick. Sources say the script is currently being worked upon and the lead actor is likely to be retained in part deux. However, it is not yet clear if Katrina will be paired opposite Hrithik again.

Hrithik Roshan and Katrina Kaif in 'Bang Bang'