Deleting sync'd photos

I'm trying to delete photos on my Ipad that were taken with my iphone (photos that came over in the syncing process). I can only delete the ones taken with the Ipad. On the other photos (from the iphone) the 'trash can' button is not active.

via iLounge Forums http://forums.ilounge.com/ipad/278475-deleting-syncd-photos.html