Synchronizing issues

Options
Hi
Me and my team is working on a Multiplayer CO-OP Game which have high level of environment destruction, i want to synchronize the destruction for example if a bomb blasts and chunks of walls scatter around the place i want to make that happen like i want the damage and chunks produced because of blast to be the same and synchronized.
i tried synchronizing the variables and also sending RPCs but no results.
PLUS
The Blast script get the area of destruction and objects available in that radius in a list and then pass the values in another script to destroy those objects into chunks. also chunks are creating on runtime.
Everything else is working fine and synchronized except this destruction and chunks are'nt synchronized.

im using pun2.