From your linked article:

Russia's call for an emergency meeting despite its own attacks on Ukrainian civilians was also questioned by several nations.

Pretty much every nation in war commits war crimes. I would seriously struggle to find a country or entity that didn't... People don't just have the soldiers line up nicely and shoot at each other until one side surrenders.

Pretty rarely do countries get investigated or convicted for war crimes... The worst like the US and Israel just ignore it either way.