As tensions mount between Arabs and Kurds in northern Iraq, the United Nations has produced an eagerly-awaited special report on the disputed areas there which it hopes will help head off a confrontation. In the latest signs of hostility between Arabs and Kurds, a Kurdish military commander narrowly escaped death from a roadside bomb explosion and a suicide bomber attacked a Kurdish-manned checkpoint. Both incidents happened in Zummar, north-west of Mosul.