Former Algerian minister Khaled Nezzar and former Syrian vice-president Rifaat al-Assad are being prosecuted in Switzerland under the principle of universal jurisdiction.
Group was slammed by authorities over claim Abuduwaili Abudureheman had disappeared in city, only to admit he never left South KoreaOrganisation may have lost sources in city after closing offices, insider says, adding families of missing people should be contacted before making public appeals