Messages stuck as HOLD in adapter engine queue

Hi Experts,

While doing a monitoring check i have observed that a huge number of messages in adapter engine have failed in 2011 and because of this a large number for HOLD messages are also there. This is for DEV environment.

Now i want to delete these messages from the adapter engine queues. I DON'T WANT TO MANUALLY PROCESS (CANCEL/RESEND) these messages since the number is 400000+.

Please suggest a way how i can delete them on maybe data base level.

Thanks in advance,

Anshul