It's war. Any incidents will continue.

Why Russia mobilised, defense, restoration, patrol. Further fighting and supply lines.

But yea infrastructure and utility operations are often the first targets. Easily targeted to cause disruption and loss. Same for all sides. Especially in areas of operation.

Some of the first targets in war, are coms, and utilities. No grid causes disruption to any opponents control.

It goes back historically to daming the Euphrates, poisoning the Wells, and burning and pillaging the crops.