Nobel Prizes aren't without controversy, and I was wondering if a Nobel Peace laureate has ever been accused of war crimes.
For the purpose of this question, I will accept accusations of war crimes by countries or other international bodies including accusations dating before the peace prize was awarded.
When writing an answer, please mention at least the following points:
Who made the accusation? Note that the question is limited to countries or other international bodies. To get an idea of what constitutes an international body (or organisation), please consider the Wikipedia page on international organisations.
What is the accusation, which war crimes are alleged? Since there seems to be some confusion as to what war crimes are, please see this accessible article the BBC wrote on war crimes.
Who is being accused? Note that the question is limited to Nobel Peace laureates (all of whom are listed here). Should the accusation be against an organisation that won a Nobel Peace price, that will also be in scope, even though the term laureate is normally meant to refer to people only.