While sabotage may be a functional term regarding the utility of the outcome, I suspect that the intended purpose was one of profit for the criminals, thus I'd rather it be labeled a "heist" or "theft" for accuracy. Sabotage, to me, makes it sound like a different kind of motivation.
From the pictures it doesn't appear any copper wires were removed, the large conductors are still very much there. They got a few 480V breakers, which aren't worth much, maybe $50/ea on eBay. It appears to be sabotage to me.
Probably copper thieves but serious stuff to be cutting up 480V feeds, easy to get electrocuted. I am surprised they don't have surveillance at these things.