Prijedor

It commemorates the issuing of a decree in May 1992 by the wartime Bosnian Serb authorities in Prijedor, which was announced on Radio Prijedor, telling all non-Serbs to mark their houses with white flags or bedsheets and to wear white armbands when going outside - an incident that has become symbolic of the deadly campaign of persecution in the area at the time.

Several hundred people gathered on Tuesday in the village of Trnopolje, where 23 years ago the Bosnian Serb wartime leadership opened one of the most notorious detention camps of the 1992-95 conflict.