The United Nations human rights chief on Thursday urged countries to step up trials in their national courts against suspected war criminals in Syria as the conflict marks its 10th anniversary.
Attempts to refer atrocities in Syria to the International Criminal Court (ICC) in The Hague for prosecution have failed, Michelle Bachelet said.
Only one person has been convicted in a foreign court for crimes against humanity or war crimes in a conflict that has cost hundreds of thousands of lives, many of them civilians.
Bachelet also called for increased efforts to trace tens of thousands of missing, whom she said included people held in jails run by government forces across Syria.