GENEVA - Syrian President Bashar al-Assad tops a list of 20 sample war crimes indictments of government officials and rebels drafted by experts for prosecution someday, a former international war crimes prosecutor said on Tuesday.

The list has been handed to the International Criminal Court (ICC), citing for each incident a specific violation of the Rome statute under which a suspect could be charged, according to David Crane, an ex-chief prosecutor of the Special Court for Sierra Leone and now head of the Syria Accountability Project.

A separate team of UN investigators has drawn up four confidential lists of war crimes suspects on all sides in Syria, but declined to reveal any names.