Sabotage of resources

[Dargon]

I am playing vanilla and the Fall from heaven mod.

Is their anyway to prevent the sabotage of my resource improvement? I am getting my production and food surply annihilated by this problem. I have tried to have units that can se invisible units stationed at the tiles but they still manage to sabotage my mines and oilfields.

 

[Refar]

"Unit's tah can see invisible units" ? What would that be ?

Anyway... Spy's sabotage stuff. No unit can see spy's. If you put your own spy on the tile howeve you have a increased chance to catch the infiltrator... Tho i think it's cheaper to just send a worker over to rebuild the improvement, than to put a spy on every mine in your empire...