How to remove the Attachments from the Test lab

Hi,

My project required very frequent Regression testing. For that we are using same set of test cases everytime. However my client does not like to keep the old attachments which we have attached during last run. Everytime i'm having hard time to remove all the attachments from 250+ test cases. Does there any simple and easy way to remove all the attachments with less effort.

Your support is highly appriciated.

Thanks

Krish