I read an article saying it could sabotage from Russian but that very unlikely. I think in my opinion it could be one of the follows:

1. Employees that have reported “maybe” issues to the managers but nothing happened

2. Sabotaging cause of Ukraine whoever is doing so wants the US to stop funding the war

3. Is sabotaging them cause is trying to make the dems lose the next elections

4. They just burst to flames but at this point I would say there’s someone that is sabotaging these plants and infrastructures