- Ukraine destroyed columns of waiting Russian soldiers with HIMARS, a Ukrainian commander said.
- He said Ukraine targeted them as soon as it got permission to use allied weapons across the border.
- Military experts say Ukraine’s ability to use Western-supplied weapons in Russia is aiding its fightback.
By whom?
https://disarmament.unoda.org/convention-on-cluster-munitions/
The Convention on Cluster Munitions (CCM) prohibits under any circumstances the use, development, production, acquisition, stockpiling and transfer of cluster munitions, as well as the assistance or encouragement of anyone to engage in prohibited activities. The text of the Convention is available for download in the six official UN languages: عربي, 中文, English, français, русский, español.
They even provided a link to signatories of the convention in your link for you to peruse.
Surprise, Neither the US, Ukraine, nor Russia are signatories.
So not a warcrime for any party in this situation